See some of my setups for small waves at
www.seabreeze.com.au/forums/Stand-Up-Paddle/Review/short-and-wide/?page=-2#1941915I am 95-100kg, and I basically favor C-Drive for shorter wide boards (<7'), when you surf a lot but loading/unloading power on the legs for pumping skate-like in turns, all in accelerations.
And and longer (> 7'6") boards, I tend to favor small, more hydrodynamic (fluid feeling, with inner foils) fins to drive more the board by its rails, such as the FCS Nexus.
I tend to mix C-Drive fronts and nexus rears on boards in the 7'0"-7'6" range
On wide tails, I find that a 5-fins setup is very interesting: you mix the performance of thruster and quad setup, while suppressing their specific drawbacks for wide tails: floating between turns for the quad, tail slippage for the thruster.
I like a thruster setup on narrow tails, quad on medium tails, and five fins (or a twin fin setup, with fins close to the tail) on wide tailed boards.
I also must say I am impressed by the FCS2 system: the fins are much better hold in the boxes than FCS1 or Future, you do not have the slight lateral flex at the base. And the FCS2 line of fins seems of very high quality (but I have only the performer model). My 7'4"x28", narrow tailed board for hollow conditions has a thruster set of XL Performer on FCS2 boxes, and seem perfect for me.
On a board with FCS2 boxes, between a set of snugly fit FCS2 performers, or my beloved C-Drives, but with a looser FCS1 fitting... I chose the Performers.