Clan War S67 Kinjutsu is too over powerd
Cooldown is just 4 turns. It increases damage for 75%, 2 turns!!! And it makes 800 damage O.o
Any 8ex user will be too powerfull and if you add Snake senjutsu on lv10, your skills cooldown are reduced for 2 turns on all skills. So this skill cooldown is for them only 2.
One more thing:
Season 62 Kinjutsu: Advanced Arching Wildfire is similar but it is some what balanced. It have 70% stronger attack but CD is 10.
I hope devs do something about this...