Why? Khorne is the strongest 2-B, he has higher ap, a bunch of resistances and lol power null.
Tiamat vs Slaanesh could go better but nobody responded to that.
@Shadow Well she also has type 5 immortality cause she transcends the concept of death and resurrection where if she dies she will just be reborn, so it's not just low-mid, she possibly also scales to God whose mind and soul are fused with the concept of eternity but that's sort of iffy.
But yea khorne still stomps.