Abi 1 - added abi damage/abi cap up and affliction rate buff
Abi 2 - buffed heal to 3k cap (still only 20% max HP, so good luck hitting it without accessories), buffed barrier to 3k, added 50% vigor buff
Abi 3 - buffed healed amount to 50% max HP (probably no cap)
On burst effect added - resets cd on abi 2.

Atum is now pretty solid damage buffer (50% vigor buff is no joke).