1-hit is not exactly instant kill especially when you play on Extreme level where enemies are just maxed up lvl and stars, you only deal massive damage but enemies still alive and your team will wiped out in 1 turn.
Back when patch 1.0.9 was not released, everything was huge mess because Devs at that time tried to fix things up and considering how blatant their cash grab is with lots of bugs and crashes. On that era, Mods are in heaven because everyone using it without any ban hammer at all.
But, after patch 1.1 released, things get started to even crazier where ban hammer started and anyone who used mods in this patch now always had issues and they cant play it anymore.
I suggest you should not tried to used it because my Nutaku account was banned last month and luckily I dont play their games anymore since last year due their game become less and less interesting to play with huge paywall everywhere.