Carry Abaddon, with a twist of Healer.
By Lift big, eat big, get big!
Carry Abaddon that can heal allies for a great amount later. 500 hp in 5 seconds is a lot. But he is mainly here to tear up the enemy team. Dont wait for the last moment for the Ultimate to activate automatically. Use it when you are about 50% HP, otherwise the enemy will patiently wait you out. If you use it at 50%, you might have enough time to survive for it to go off CD. And usually at 50% or more, people will use alot of spells on you, so you might heal right back up since they wont expect you to ulti.