I get nervous dividing the minis. Will they survive? Is it too small?? Etc. So I've devised a plan:
When dividing Hostas, especially the minis, I make couple of smaller clump (usually 1 - 3eyes) and plant near the main plant so it looks like all one plant.
Next spring the small clump will be very self-sufficient with additional eyes: ready for swap or successful re-locating.
I am still a new hosta lover and ready to hear good ideas.