Here is one of my EFC Tower past-times to consider.
Clover, Choko, Ashikaze Ld, Lois Ld, Arturo, Bikini Joe Ld, Bertha and Matriochka.
Personally, I would use Pussycats as a half for Damage Reducers especially with Freaks to have situations where winning 3 rounds is not essential to winning.
As others mention, it is more about solid experimenting. If you see you are being countered easily by clans and players using cards designed to combat Pussycats, consider the other clans:
I use Freaks with Pussycats together to control life points.
Nightmare or Piranas if GHEIST and Roots are becoming prominent.
Raptors if Uppers or Montana notable give trouble for you to win rounds.
Try All Stars against Jungo to bypass their power. Maybe Ulu Watu or Bangers if you need power
I would use Mono Pussycats if another strategy can be used.
I don't know what zone you're in but... I'm in Z Palace right now and the best deck I've come up with is Gheist/Pussycats. Don't get me wrong some people are doing much better than me but I'm sitting at 2800 right now so I think my deck is viable.
I don't think I've seen anybody else using PC. So, if you can make it work, it has a distinct advantage of people not being ready for it. Make sure you're using Gea. Gea is veeeery powerful with all of this power manipulation going on.