For f2p earth is probably the better out of those 3.

*x *x *x
Tsunade Tobi Main Sage Jiraya also fits instead of Tobi, whichever you like more.
*x *x Hinata Can move Hinata back 1 so Tobi is move 2 not 3 if you want.

2
3
2
2
2 Talents with Bull summon.

Earth mains are kinda weak to fire mains without Gakido, but this build should be good vs water/wind/lightnings so over all it's good.