First half is good with either Blade or Himeko, but I used Blade here so I could save Sparkle for the 2nd half which is a must since pretty much all of my dps need her.

On 2nd half Clara and Dr Ratio have similar performance too. I kinda regret going with Pela over Silver Wolf though, did it only because of the guy that heals in the first wave but then Ratio missed a bunch of follow ups because there werent enough debuffs so that sucked. Also those enemies that regen toughness to full and auto heal are super annoying.