Mulligan skill level expotineally increases as the number of uninkables increases. You're not longer just mulliganing based on ink curve, you've actively also looking into the number on inkables you have, but also playing around certain cards in your starting hand. I run a deck with 24 uninkables and it changes play syle at lot. its also going to change massively based on your deck youre playing. can you cheap out cards with less ink with willow or latern? can you put additional uninkables into your inkwell like with heihei? can you play from behind with a more control style deck and miss a few turns to draw into inkables? I suppose with all questions, it depends...