if hashi starts with a mukuton clone then i dont think muu can win. it makes sense that he'd start with a clone because he'd be preserving chakra and analysing muu's movements and techs. why fight muu when a clone can do it?
lets face it jinton can destroy any wood tech and muu being invisible would be able to take flight and get some distance on hashirama. if he can see through wood clone jutsu then he can use the cube version of jinton which can turn hashi into dust within 5 seconds but if he cant see through wood clone jutsu then im afraid i don't think muu can win.
also why can't sage mode find muu?
muu is a sensor you know?,he can tell how many hashirama's are around,unlike shadow clones,i dont think wood clones distribute chakra evenly do they?,if they cant,muu can sense hashirama,if they can,then muu would have a very difficult time.
Sm cant sense muu because it senses chakra,muu while beaing invincible has no chakra or even form,which is why i asked if he can fire jinton while being invincible,if he can he beats hashi,power is useless if you cant use it,if he cant,then hashi can sense him the moment he becomes visible and maybe hide or counter it.
I wonder if muu's jinton can destroy an island like onoki,if it can,he wins