You just need ignite and a R1 proccer like naruto or kankuro gnw. I've never really had problems with my f2p fire account and the classic naruto hinata tobi build since survival lets you arrange your ninjas optimally to be able to chase interrupt (except for earth main steel body) and take them out accordingly (unless you're always losing initiation for some reason, which shouldnt happen at stage 10 and 11)
Earth weakness is being controlled, just take out their debuffer and start chipping away at the main while comboing the rest of the team.
This post was last edited by 101***@facebook at 2016-11-22 16:09