Got bored, so I decided to power scale Durza from Arcane Adventures to the best of my ability. Here it is Power Scaling Durza - Google Docs
Discussion is allowed as this is not fixed.
Update : I forgot Absorption curse is external as external curses are different than elemental curses as they do not allow you to phase through physical attacks. However since he shed his physical body to become an immortal dark spirit, logically he will still phase through any physical attacks, just not with his curse.
I decided to go with continent level durability instead of multi-continent level for Durza and Theos since giving them muti-continent level durability seems like a bit of a stretch to me logically as Durza did not totally annihilate the continents, only splitting them apart into islands thus I decided that continent level durability is more likely. Still you can argue on this.