Hmmm...

Those Arena, Survival Trial, Rank credits are used to exchange for ninja fragments in the shop (quite obvious, eh?). Each of the PvE (Player vs Environment) will spawn a correspondent type of credit for a particular shop. Just think of them as different kinds of ingame currency.

In early game, those two are good; later you will come acroos better eplacement for them however. Plus, you get free coupons every time you recruit a new nin, so get those easy to recruit ninjas fast.

Iruka... is tricky to get. Either you have to buy him - last event he was 32 coupon/frag; or get him via fragment refining. Fragment refining is similar to an old gara sale: you exchange extra fragments of a 5 star ninja you have, each fragment will give you 10 credit in return, and when you have enough credit, you could exchange them for Iruka fragment (3k point per 10 frag and either Seal OR Summon scrolls).

Nine-tail event... yeah, maybe you are on one of those legendary servers. Can't help you with that.

Gaara shield all Wind atribute nins on your team. He has Super Armor, which makes him immune to displacements (Low/High Float, Knockdown, Repulse); this is why people use him as a tank. His barrier boost wind nins attack/ninjutsu by 40%; which is quite good early game.

As for line-up... really can't help you with out knowing your roster. This post was last edited by Watanuki13 at 2017-2-4 18:02