[Trexmaster]

I run a 230 hp dodge build with a green scale tunic
I get anywhere from 19 to 100+ fp back a turn.

Except that '100' cap is likely accounting for dodges with the tunic, which is either an absurdly high amount if faced with multiple evasion-triggering checks, or nothing at all. So not exactly something game-breaking or relevant at all to the HMC.

Either way, the HMC is only an issue due to how much it surpasses other forms of FP regen with high enough FP. As everyone already stated, high WIL/FAI/SAN (see: priest and or gs setups, or other mages who like SAN and use FAI) will get the most use out of it due to their absurd FP values.

Altering it to cap at 5 FP is the safest way to go.