Hulk/Heimdall/Thor Rags war dream team. Not only does he have a huge tank of hit points, but of course he gets much stronger as he goes down. So he can take a beating if you begin the fight with full health. You can eat a combo or maybe several from a war boss. Indestructible 1 kicks in at 20% health from Rags synergy. At this point you are hitting like a God. If you happen to slip up again, it's ok, your boy Heimdall is here to rescue you. Indestructible and life restored. And since Heimdall is Thors boy, you can back up and hold block to heal yourself to 15% health to continue pounding down the enemy. Also you can complete all of your Uncollected paths while teetering at 20% health with Rags/Heimdall in the party. If you use suicides, the willpower from the bleed will heal you for several % while you are indestructible. If you have Void in your party and you start the fight under 20%, you can parry at the start and then L1 while indestructible with suicides, the recoil will get absorbed and you have the enemy stunned and dead while you are indestructible and healing.
Demi god to God tier by way of synergy.
OG Hulk.