Awesomesauce.
Great. gave a nine because of many movement glitches.
Strategy for ultra winning above lvl 11: upgrade all monsters to max everything.
Use maxxed out 2-3 slicer guys with the scythe arms and use the rest of the dna for the fast and first alien. maxxed out, they need to be all from one side, all falling in front of the pack. save like 8. then use behind the mob . make mob then slicers then reinforcements.
They will NOT get rid of all enemies. just most of them.
Use he bonuses and precise shockwaves to destroy the rest of the buildings after the slicers. I am at lvl 17 with this technique.