oh shit the boxes? dude, i was fixing those so you can get more ammo and grenades from those boxes usually they're broken, an engineer with second ability can repair them, and you guys can grab them shit off of them.

as for bots i think 4 turrets (spread out between all engineers) and 2-4 air supports (spread out between all tactical) the thing is if there is 12 engineers.... you better put a turret up first lol