In general fire main is best utilized as a support. Almost in every team you use shield mystery, sleep/4man fire attack and mirror (unless you run team with edo itachi, then leech/buff). Usually you want to have main's clone in front of your pos1 so he tanks dmg (unless its sosp). Bani chakra passive comes in handy when you have multiple mysteries that cost a lot of chakra (for example shisui and minato). He's a good main, good mix of everything but doesnt stand out in anything. His kit has a lot of possible debuffs to cause - sleep, imprison, ignite, lowers enemy ninjutsu - but lowering ninjutsu is a pretty weak talent currently and imprison is never taken for the debuff but to link chase.