It's common knowledge that all combatants revived with Edo Tensei are gifted with limitless chakra.
-So why are Hashirama's clones weaker than him?
(Apologies, I'm fairly new and don't know how to link yet, but to support my statement Marada expresses boredom at Hashirama focusing all of his...
I mean, he would have an eternal body just like wants, and he'd have the strongest Uchiha body.. Do you think he would just turn be like "**** it guys, no beef" and go back to his lab?