The usual fix for drifting faces is longer prompts. cnemai fixes it with a sheet: one per character, place and prop. Pick the hero version once, and every take in the film draws from it.
One sheet per character
A cast sheet holds close, front and back views. Earlier versions stay listed beside it, and the sheet is marked when it's in production.

It rides on every take
When you ask for a take, the sheets for everyone and everything in the shot go with it as references. You describe the action, not the face.

From one shot into the next
The last frame of one shot can open the next. Face Masks Off held one cast across 102 cuts.
