Originally Posted by
KaPe
Check the name again, it's the damage he does to himself. It's always like that, you get hit by two other people once (plus more if you stand in some lines) and hit yourself twice each second. The last part is the most painful since you can't reduce it by moving away - obviously. And 40k is hardly "high", seems like pretty decent amount. 'Course this includes Disc getting 30% reduction.
Personally, I just use glyphed Binding Heal for that part if I get an Edge. It eats through mana but works pretty well to keep yourself and two other people alive. Between this, mending and shields, it takes some additional damage to be really endangered.