kushina atk/nin is actually not that great, only her def/res is a 10 rounder op. the bad side is extremely slow game.

however since edo minato is the most popular ninja now, people are using kushina def/nin to counter edo minato even when they lose at init.

imo kakuzu/ rinne sasuke are equally seconded at footing, kakuzu is a great all rounder as well as Akatsuki support

but countered by rinne sasuke. rinne sasuke is good vs ronin naruto too, but hard to match with supports imo

imo also bad vs immunity with dodge/healing ninjas like the popular edo minato and kushina def/nin

so you can see each has their counters, for far reachers and hard-core gamers edo minato is the path to go, he is expensive,

but he can be match with many other op bt supports for variety n fun! his dodge and mass interrupt = favorite among power/init competition.

he is good for 3x edo minato 3v3 battles like gnw. however if ur low/f2p tier player, you might want to forget about power/init competition.

your only fighting others on your level so just pick your favorite core ninja playstyle, then collect other frags slowly..

just hope u don't meet counters and don't complain when you lose 50% of the time to power/init op players.

stack stack stack coupons and invest in power items n fuku whenever possible and simply have fun using your few core ninjas regardless.

ps: yes chasing the power/init ladder is nver ending, but if your gonna play, u still got to chase it in order to have a semblance of winning.