[Rendar]

For reference on blue pot spam.

They (for 3m and nothing else cost wise) give back 45 FP.

Descending Ouroborous gives back 45 FP as well, for 2m (and is class specific).

The difference is the DH skill has a cooldown of 2 turns and requires you to be airborne to perform (which Leaping Lizard costs 5 FP and 1 Momentum).. making it recover, technically, 40 fp.

Blue Potions shouldn't be infinite FP for no actual cost. If FP costs are so bad on some classes that you are unable to sustain through 5 rounds of combat with your build. One of a few things should occur.

A ) Your class needs an FP touch over all, or you should play a sub-class that has the FP sustain to handle it (Demon Hunter, Monk, Dark Bard)
B ) You can equip FP regen, you can get 6 FP / Turn from just existing with a HMC + Capacity. If you take 5 points in chivalry, you get 5 FP back for every frontal attack you do

If the issue is "I can't play if the fight lasts longer than 7 rounds" or "I can't play if the fight lasts 10 rounds", then sustainability of FP should be something you have to account for in a fight. Not just...

Being able to chug blue potions indefinitely.