Maybe up the drop? On the harder ones, one death is basicly loss because you just cant clean em up with a weapon bellow 10 (and even with that its hard on ssh). 24 wave mission takes forever to complete, but it sucks so bad to die once on wave 19 only to see that your weapon is now 6 because you only had 2 atom drops all game…
Just use satellites.
Don’t kill edges. Kill the most of chickens, saving 2-3 chickens at the edges, then destroy center. If you can’t destroy everyone, destroy center and they will fly away.