Why is Darius' heal an instant burst heal? Shouldn't half of it be over-time?
Darius' burst healing when he's at low health makes him pretty damn hard to finish off, almost to the point where he becomes a cheapass. He needs to not have such potent instant healing available to him, even if his axe's blade size is getting nerfed (it hardly matters).
I've suggested this change before, but I'll suggest it again.
#Divide Darius' healing so that half of it is immediate, and half of it occurs over 2-3 seconds.
This way, you don't see a Darius instantly heal 1k health with a good swing, and have a REASONABLE opportunity to kill him before he vamps up everything.
And no, Morello's doesn't always work.