Carry Abaddon, with a twist of Healer.
By Lift big, eat big, get big!
[UPDATED FOR 7.00]
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. With Aghanim added to Abaddon, you can really help your teammates by redirecting some of their damage to yourself, whilst healing yourself even faster in the progress.