Its a interesting formation you've got, has decent amount of debuffs. I won't say this lineup is bad but, if your focus is Mu then you're best with earth main. Earth main can give more buffs to Mu and shield him and the clone which greatly helps since Mu is completely useless after his clone dies.
If you were to switch to earth main try this
gnwkankuro x x
kabuto mu earthmain
x x x
talents are 2,3,4,2,2
summon is the frog
EDIT: dont underestimate GNW Kankuro, he is hell of a good ninja especially for f2p like you who don't have many ninja options! :)
This post was last edited by wc0***@gmail.com at 2017-5-17 00:19