There's so many things to concider here! You can talk different combos allllllll day.
Board and volume, fin and size, sail and size, mast and percentage, this is a never ending thread there are possibly thousands of combo's
NDH47 good call on the Hellcat though I personally would lean more towards the Firefly for your board. V6 is more for boards like Xcite ride. FSW is an awesome board fins are everything on this board so try as many as possible till you find the right ones. Good to see your using the correct masts

This is often overlooked
and concidered not important by many and they quite OFTEN blame the sail or the board, fin and so on. I'm getting a Hellcat 5.7 for my supersport, All the fast guys here love em, can't wait!!!!!