The developers clearly need to re-evaluate some mage's skills. The aggro from Lifegiver is too much (how are mages going to support when their skill are the cause of their death). Follow up by 2 regen upgrades which is again useless in high level...

Warrior/Rogue "Mana! mana plz!"
Mage *Cast Lifegiver*
Mage #laying on the floor#