Only take 2 or 3 Cell-generators and lock in on Genes as soon as possible. When you get 1 or 2 Tissues unlocked, step into Neurons and unlock only as many of those as you have active Genes.
With a few Genes, Tissues and Neurons it won't take long to unlock the auto-killer in the Enzymes. Then you take a few Evocytes to speed up getting to the Trancension requirement and go ham with Cells.
The speed and type of attacking cells depends on how many Cell-Generators you have unlocked.