it's rather easy. just get flamethrower, the extra bombs and then call 3 waves and boom. i finished the game like that. thank god you could only call 3 waves or it would be easier!! oh and by the way, the 0 dmg for 10 waves achievement doesn't work
brimstone (lvl8) solution in 76 cycles total, 12 cycles max per manipulator:
c,1,11;t,3,9;t,5,11;b,7,11;c,6,9;t,8,7;t,10,9;m,11,11,90,1,cruodl;m,3,11,90,1,crrruudodrww;m,8,9,90,1,crr2ruodrwww;m,13,3,180,1,cuuodd;m,11,6,90,2,clloll;
just because this game requires a BRAIN it doesn't mean it sucks!! I'm loving it! There's another one with a robot if you guys wanna play something similar. Don't remember the name though, something with "bot" in it.
If you slow it, then poison it, the slow effect goes. If you poison it, then hit it with another tower the poison effect goes. This means "just don't use slow or poison" ffs.
Yeah, it's sad there is no XP cap in the first levels and there is a MAX xp for the heroes, who get no other skill than their initial one. It's really really easy because of its simplicity.