November 11, 2025: Snow Mountain Descends. As a classic activity of Arknights of Tomorrow, many players want to charge for a surprise attack to earn full rewards during the remake, but they are afraid of spending time repeatedly. Don’t panic! This article has compiled a pure AFK placement strategy for OSX1 to OSEX8 raids. The core operators are all popular models, and with enough practice, they can complete the placement and collect their phones. Each level can be tested once, and those who are clumsy or slacking off can directly copy their homework!
Focus first: The core principle of sudden attack and AFK
Before dismantling a level, it is important to clarify three key points and understand them before looking at the specific level to make it smoother
Operator priority: Refund fee>Line resistance>Group attack output>Leakage filling. The core of AFK is “sufficient cost to allocate, able to resist after allocation, and clear output quickly”. Don’t put on high cost output first, which may cause card fees;
Bottom line of training level: Vanguard level 20 (skill 7), Heavy equipment level 30 (skill 7), Group attack output (Ayafara/Silver Gray) level 40 (skill 7). If the training level is lower than this, there may be missed monsters. It is recommended to pull first;
Skill automatic activation: Except for a few key moves in certain levels (such as OSEX8’s Silver Ash), all other operator skills are set to “automatic activation”, truly achieving the goal of “no matter what you do after finishing”.
OSX1 Assault: Novice friendly, stable with a single output
Core staff and training level
Pioneer: Peach Blossom Girl (Essence 2 20, Skill 1 7, Automatic)
Reloaded: Star Bear (Essence 2 30, Skill 2 7, Auto)/Alternative: Linguang (Essence 2 30, Skill 2 7)
Group attack output: Ayafala (level 2 40, level 3 skill “Volcano” 7, automatic)/Alternative: Kerobo (level 2 40, level 3 skill 7)
Missing Sniper: Able Angel (30 in skill 2, 7 in skill 1, automatic)/Alternative: Blue Poison (30 in skill 2, 7 in skill 1)
Hanging up and placing steps
At the beginning, place Taojinniang on the left side of the map to the “return fee position” (facing the enemy for easy general attack return fee), and activate the skill automatically;
When the cost reaches around 18, place the Star Bear on the right side of Peach Blossom (anti line position, blocking the enemy’s necessary path);
Cost up to 25, place Ayafala directly behind the Star Bear (the volcano can cover the entire resistance line area);
Finally, the energy angel is on the right side of Ayafala (a ranged monster that has leaked the net), and after setting it up, it can be hung up directly.
Key points to note
The enemies in this level are all ordinary Icefield minions. If you have enough output, you won’t miss anything. You don’t need to manually use any skills and lie flat throughout the entire process.
OSEX2 Raid: Pay attention to long-range ice shooters and add a guard to prevent home theft
Core staff and training level
Pioneer: Peach Blossom Maiden (as above)+Extreme Realm (20 in Essence 2, 7 in Skill 1, Auto) – Faster Double Return Fee
Reloaded: Sereia (Essence 2 30, Skill 2 “Calcification” 7, Automatic)/Alternative: Baisong (Essence 2 30, Skill 2 7)
Group attack output: Ayafala (same as above)
Guard: Lapland (Level 2 30, Skill 7, Auto)/Substitute: Fantine (Level 2 30, Skill 7)
Hanging up and placing steps
At the beginning, place Taojinniang in the lower left corner of the fee slot, and then place Jijing in the lower right corner of the fee slot (double vanguard quick fee slot);
The cost is up to 20, and the Sereya resistance line will be placed at the middle intersection;
The cost reaches 28, and Ayafala will be placed behind Sereia;
Finally, place Lapland (Qingyuan Ice Shooter, to avoid stealing homes) below the “Remote Monster Birthpoint” in the upper right corner, and hang up after finishing.
Key points to note
Don’t be in the wrong position in Lapland! You must be able to hit the ranged monster coming from the top right, otherwise Sereia will be remotely ground to death.
OSEX3 Assault: Add Medical, Stable Resistance Line
Core staff and training level
Pioneer: Peach Blossom Girl (as above)
Reinstall: Star Bear (as above)
Group attack output: Silver Grey (40 in skill 2, 7 in skill 3 “True Silver Slash”, automatic)/Substitute: Huang (40 in skill 2, 7 in skill 2)
Medical: Shining (Essence 2 30, Skill 2 7, Auto)/Alternative: Homer (Essence 2 30, Skill 2 7)
Hanging up and placing steps
At the beginning, Taojinniang placed the top left fee slot;
Cost 18, put star bear resistance line in the middle;
Cost 22, put a Shining Spirit on the right side of the Star Bear (to add defense to the Star Bear and withstand the high damage of the Assault Monster);
Cost 30, silver ash is placed behind the flashing spirit (real silver slash covers the middle+lower left intersection, clearing monsters quickly), hang up.
Key points to note
Shining spirit must be placed next to the reinstallation, with priority given to milk reinstallation to avoid sudden death during reinstallation; The Silver Gray skill is set to automatic and does not require manual activation.
OSEX4 Assault: Dual Output Coverage, Not Afraid of Many Monsters
Core staff and training level
Pioneer: Extreme Realm (as above)
Reinstall: Sereia (as above)
Group attack output: Ayafala (same as above)+Silver Grey (same as above)
Leakage filling: Red (Essence 1 50, Skill 2 7, Automatic)/Replacement: Gravel (Essence 1 50, Skill 2 7)
Hanging up and placing steps
At the beginning of the game, place it in the bottom right corner of the fee slot;
Cost 20, put Sereia at the middle intersection;
Cost 25, place Ayafala on the left rear of Sereia (volcano covering the left side);
Cost 35, put silver ash on the right rear of Sereia (real silver chop covering the right side);
Finally, put red on the “missing monster point” in the bottom left corner (in case of missing monsters, the red attack can be dropped in seconds), and hang up.
Key points to note
The positions of Ayafara and Silver Gray should be staggered to ensure that the skills cover the entire map. Red can be placed last, so there’s no need to rush.
OSEX5 Raid: Pay Attention to the Icefield Giant Statue and Launch the True Silver Slash in Advance
Core staff and training level
Pioneer: Peach Blossom Girl+Extreme Realm (Double Return Fee, same as above)
Reinstall: Star Bear+Sereia (dual resistance line, same as above)
Group attack output: Silver Grey (50 for Precision II, 7 for True Silver Slash)+Ayafala (as above)
Medical: Nightingale (Essence 2:30, Skill 7, Automatic)/Alternative: White faced Owl (Essence 2:30, Skill 7)
Hanging up and placing steps
At the beginning, place Peach Blossom Maiden (bottom left) and Extreme Realm (bottom right), and return the fee for Double Vanguard;
Cost 22, place Star Bear at the left intersection in the middle and Sereia at the right intersection (double heavy equipment blocks two monsters);
Cost 28, place Ayafara behind the Star Bear and Nightingale behind Sereia;
Cost 38, silver ash is placed behind the nightingale (real silver chop covers the double heavy equipment area);
When the 8th wave of “Icefield Giant Statue” comes out, manually turn on the Silver Grey True Silver Slayer once (then automatically), and hang up at other times.
Key points to note
This is the first time a giant statue appears in this level, with thick blood and high attack. Silver ash can be manually turned on once and dropped in seconds, and then it can be automatically activated without having to keep staring.
OSEX6 Assault: Utilizing ice surface deceleration for smoother output
Core staff and training level
Pioneer: Peach Blossom Girl (as above)
Reinstall: Sereia (as above)
Group attack output: Huang (Essence 2 40, Second Skill “Boiling Explosion” 7, Automatic)/Alternative: Thorn (Essence 2 40, Second Skill 7)
Remote output: Broca (30 in skill 2, 7 in skill 2, automatic)/Alternative: Black (30 in skill 2, 7 in skill 2)
Medical: Homer (as above)
Hanging up and placing steps
At the beginning, Peach Blossom placed the top left corner of the fee slot (if the ice slows down and the enemy moves slowly, Peach Blossom can spend more);
Cost 20, placing Sereia at the intersection of the ice surface in the middle (slowing down on the ice surface and reducing the pressure on Sereia);
Cost 25, put Homer on the left side of Sereia (drone milk, wide coverage);
Cost 30, put Huang on the right side of Sereia (melee group attack, face to face clearing monsters);
Cost 35, put Broca (remote group attack, damage repair) behind Huanghuang, hang up after finishing.
Key points to note
The ice will slow down the enemy, so there is no need to rush to release the output. When the cost is enough, the output can be cleared more easily.
OSEX7 Assault: Double Medical Insurance Heavy Equipment, Not Afraid of Continuous Blood Loss
Core staff and training level
Pioneer: Extreme Realm+Peach Blossom Girl (Double Return Fee, same as above)
Reloaded: Star Bear (Essence 2 40, Skill 2 7)+Linguang (Essence 2 30, Skill 2 7)
Group attack output: Ayafala (same as above)+Silver Grey (same as above)
Medical: Shining+Nightingale (Dual Medical, as above)
Hanging up and placing steps
Opening Peach Blossom Maiden (bottom left)+Extreme Realm (bottom right), quick refund;
Cost 22, place a star bear at the left intersection in the middle and a temporary light at the right intersection (division of labor and line resistance);
Cost 25, place the Shining Spirit behind the Star Bear and the Nightingale behind the Light (separate milk for dual medical treatment to avoid rapid blood loss during reloading);
Cost 30, place Ayafara behind the Shining Spirit and Silver Ash behind the Nightingale;
All skills are set to automatic, just hang up (this level has many monsters but low damage, dual medical and dual output are very stable).
Key points to note
Don’t let one medical milk be refilled twice, it’s easy for the milk to not come through. Separating the milk is more stable.
OSEX8 Assault (Final Level): The last wave is manually turned up, while all others lie down
Core staff and training level (slightly increase training level at the final level)
Pioneer: Peach Blossom (Essence 2 30, Skill 1 7)+Extreme Realm (Essence 2 30, Skill 1 7)
Reloaded: Sereia (Essence 2 40, Skill 2 7)+Star Bear (Essence 2 40, Skill 2 7)
Group attack output: Ayafala (Jing2 50, Volcano 7)+Silver Ash (Jing2 50, True Silver Slash 7)
Medical: Shining (Essence 2 40, Skill 2 7)+Nightingale (Essence 2 40, Skill 2 7)
Fill in the gaps: Red (Jing 2 20, Skill 2 7)
Hanging up and placing steps
At the beginning, Peach Blossom Girl (top left)+Extreme Realm (top right), dual pioneers to maximize the efficiency of cost recovery;
Cost 25, put Sereia at the left intersection in the middle and Star Bear at the right intersection (double pack to carry the final level elite monster);
Cost 30, place the Shining Spirit behind Sereia and the Nightingale behind the Star Bear;
Cost 35, place Ayafala on the left side of the Shining (volcano covering the left half), and Silver Ash on the right side of the Nightingale (True Silver Slash covering the right half);
The cost is 40, and the missing point in the lower left corner is highlighted in red;
The first 10 waves are fully automatic, and in the 11th wave, when the “Double Snow Mountain Colossus+Elite Monster” are released together, manually activate Ayafala’s Volcano+Silver Ash True Silver Slash, and after a second, continue to hang up until the level is cleared.
Key points to note
This is the final manual level, don’t worry about other times. Aiyafala and Silver Grey finish the Elite Monster in seconds, followed by the minions, just clear them.
Finally: General Lightning Protection Guidelines
Don’t skimp on advanced training! Pioneer is the “cost engine” of AFK, which is slow to recover due to insufficient training and easy to get stuck or miss out on fees;
Don’t randomly turn off skills automatically! Except for the key features of OSEX5 and OSEX8, all other skills are set to automatic, while manual skills are easy to forget;
Don’t panic without any illusions! For example, if there is no silver gray to use Huang, if there is no Ayafala to use Ke’ebo, as long as it is a group attack output and the training level is sufficient, it can be used;
Don’t panic if there’s a leak! Add a red or gravel at the missing monster point, their surprise attack skill can instantly drop the monster that has missed the net, without the need to restart.
According to this guide, the OSEX1-8 raid can be completed in one go without the need for repeated dips. When fishing, simply set it up and easily earn rewards. Wishing everyone a smooth pass!
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