Originally Posted by Haters

This is the strategy that I used to cleared the ?-4 :
- Put 2 fastest squads on the 1st tent ( from left to right ) and 3 other squads on the last tent, and then pray for the RNG.

EDIT: about the team speed : my 2 fastest squad ( main squad and helper ) have ~620, and the last 3 have ~450 speed.

Similar here, though I went 0-2-0-3. There's only one RNG node on the map, but it's right in front of the boss in the bottom left part, and 3 units should pass it to stay in the bottom left part to succeed the map, so yes, luck is a big part of the equation. Though I do think it helps if all your squads (except for the one taking the right side of the map) arrive at similar times at the node leading to the bottom left part, but you also somehow manage to get your fastest squad to go for the boss. Maybe a high power 650-700 speed squad taking the right side of the map helps? (Though I had an even faster squad taking the central path to the boss myself)