Perk-specific potions

While I like the potions that allow players to re-allocate royalty points, I would like a potion that targets a perk of my choice in the character, creature, or class categories. Practically speaking, I have a lot of points dumped into the character category specifically, and I only regret one or two spending decisions. It would be nice if I could remove all royalty points from just Spoils of War, for instance, around the time when I no longer need resources and am pulling the Nightwing Gargoyle out of my party.