in nilla, the concept of safe expo are alot easier due to the fact that there is no more to dt harass, while ultra/ling may be useless, the power of hydra is still deadly ;( and u can have a good mix of muta/hydra/drop without worrying about sair to stop drops, and dt to rape expo. zvp in nilla makes it alot easier if Z goes from 2 hatch muta/ling - > pure hydra; all you need is a bit of micro to dodge storm and its GG