Well from my experience it’s best to use your own puppets, but the way I have mine set up, I use about 5 layers and a mask per eye.

The blink cycle takes 5 frames altogether:

1. Neutral
2. Widen
3. Eye closed
4. Eye closed (a few pixels lower)
5. Neutral

This gives the blinks more motion than a 1-frame blink, but still quick enough to be passed off as natural.

The Obstructing Eyelids (Squinting) for top and bottom are each on their own layers for each eye, so 4 layers for eyelids and 10 for eyes. I recommend using a Folder for each eye.

You can tween the Shine, Iris, and Pupil layers by selecting them all at once and moving them together to save time by getting them lined up perfectly the first time. The White layer and White Mask layers are the same shape, so that the bounding box masks whatever isn’t touching the white section of the eyes (white skin is hard to show this).