I suggest the AP2000-35 as your replacement. I switched to this from the 4 paddle which was also slipping on mine around the same sort of power level as you. The pressure plate was the weak point on mine.

The 2000-35 kit has the strongest pressure plate available from AP. You can use this with your existing paddle clutch IF this is still serviceable but it will be brutal!

AP don't sell this plate with the 4 paddle as a kit for this reason. In kit form it comes with an organic clutch which so far for me, has been fine.