1. if u dont know all of them http://www.narutofob.com/naruto-bloodline-limit.html
Well... i think it probably is Bone Arsenal--> tell me what u think :P
I Dont want to Spoil but they allready had a fight...if u want to see/read all that ---> http://www.onemanga.com/Naruto/
b2t its a huge and awesome fight !
Sasuke will win ! Gaara lost to Deidara and Sasuke won against him. Even if u dont accept that argument there are all of sasukes new techniques and his huge amount of chakra