Leech do'nt work against magical attacks, and not sure it's still OP when you play on hard difficuly against end game ennemies.
Doesn't matter, it shouldn't just be balanced against the hard difficulty setting, but rather all settings. Damage and healing are not directly impacted by those settings anyway.
I don't have a lot of experience with Leech, I literally tried it once during beta for a handful of levels and it was (at best) some minor damage mitigation by healing a small percentage of the damage I was taking every turn. That appears to be no longer the case, and when used with other abilities its effectiveness is off the charts.
