https://www.rocketjumpninja.com/top-mice
https://www.youtube.com/watch?v=QVI3mepUHuE
I would recommend checking these out if you're unsure, he also has done reviews on all the mice in the list so you can check those out too. Considering the FK2 is a relatively small mouse I think something small would suit you, like the Razer Viper Mini or Glorious Model O- (assuming they fit your hand dimensions well).