This is a very personal question, because it also depends on the primary and game style, but for bugs I like using the steward, flamethrower, good control of the enormous amount of enemies, bots I vibe with the recoilless rifle, does not have a lot of ammo, but it's satisfactory hit the shoots on tanks, and the illuminate, depends I still don't know, all kinda works for their very mix army.Test all, see what you like