Slow and steady's been winning the race.
You'd be surprised how many people fuck up against Ermac when he starts just pacing.
No blocking, no dashing, no nothing, just slow, patient steps, waiting for even the slightest movement.
Especially against a Reptile or a Quan Chi who have to leave themselves partially open and in danger just to get their attacks off, careful steps means a careful eye on those feet so you can yank them right out of their shoes the second they step wrong-ways. Not even a need to get fancy when even a basic TKS on-reaction combo gets you 30%.
I <3 Ermac.