+ Pakkun summon mystery

Key is interrupting Itachi and/or stealing chakra from your opponent. Round 2 you will have 2 interrupts (if you can make your main faster, obviously Minato should be the one who's stacked), + Gaara's immobile if you have mystery +1. Naruto can only control your main with mystery (you can try steel body also, but Itachi kinda screws you if you mistime your mystery r1).

In this one you need good timing (interrupt Itachi with Iruka). Damage output is pretty insane though.

BTW similar power doesn't necessarily mean you have similar chances of winning. If your opponent has position 1 substats (critical, injury) much higher than yours, then you most likely don't stand a chance even with the best possible team you can make.