[Autumn]

I just want to note out quickly which skills already have no benefits for having a white spirit, not for the sake of argument, but as an example.
Convert, Cleanse Body, Recklessness, Hand Trigger, Pocket Sand, Watchful Eye, Bashfix, Steel Mind, Absorb Veil, Charge Mind, High Speed Divine Words, Backflip, Winter's Bite, Create Shade.

And not to mention numerous skills that only have reduced FP costs instead as their reward for spirits, Fast Offense would fall under this category if this change took place, as its FP cost is reduced per rank.

So I will change my proposal slightly:
Fast Offense does not scale momentum addition after rank 5, but fp cost scaling still remains.

I'm not trying to sound like an asshole, I'm just standing up for the very few people who bring summoner to summon, and encouraging class diversity amongst them, but if you want to erase one of the two skills Bonder has compatible with grand summoner, instead of addressing the actual problem, be my guest.