User blog comment:Water Dragon Slayer/DREAM BATTLE CHRONICLES: THIRD MATCH!/@comment-11966702-20130804065126/@comment-7418318-20130804100426

I wouldn't be so sure. Hades was chosen as master of Fairy Tail, had more than 100 years to pick up some tricks.

But most important of all, even after Hades took plenty of damage, lost his demon heart and Ultear restored the Tenrou tree (thus giving the FT members a powerboost) Natsu was unable to beat Hades by himself, even though he beat Zero.

I think a demon-less Hades is equal or even stronger than Zero.