Quote Originally Posted by Alive2005 View Post
Oh, so instead of anything I said, combining multiple units to get to 4/5 would have a 25% chance, then another 25% chance, etc.

Does that mean that, theoretically, you could go up two skill levels in one go by doing that? You'd have to be absurdly lucky, but still.
Yes, you can even go up 4 skill levels at once theoretically. For 1/5 -> 5/5, the chance is around 10% (equal to pulling a plat from the shrine) if you use Rainbow faeries and 0,6% if you use a unit with the same skill.