Sadly you outscale cat to the point where you can solo him with main alone. By the time you hit 60, the hard cat will be easier then medium one is for you now, it just has double hp.
Oh well at least on CN they have harder cat versions, hope they get added here soon. At the moment i take 1 turn to kill it because it still has same hp as it did when i first unlocked it at 60 but my power is now more then double.

But if you want to speed it up anyway the current sign in ninja GNW Kankuro does ignite and poison which add 5k damage per round on cat also he has 100% combo starter from normal attack, so you get extra combo turn 1 without needing to get lucky and one of your ninjas to proc it. So just add him to line up. GNW Kankuro/Kakashi/Hinata work as a normal team as well if you want to try him out, not just for cat. This post was last edited by Dym at 2016-10-25 09:31