Yes, but I'm having trouble thinking of things that would work here, so I'm looking for ideas. That's why I posted this. If I just wanted to come up with something on my own, I wouldn't have bothered.
Oh, I thought you were asking what the existing lore suggested.
...I don't really have any good ideas off-hand, unfortunately.
Yeah, that's why I want the two powers to work together. If they have a multiplicative effect, it should be more efficient.
I'm not sure that's feasible. This game doesn't really have multiplicative effects, and I think adding them could get screwy.
If the two variants overlap, it's probably fair to make one of them cost only 1 Refresh if you have the other. Sort of like how normal Sponsored Magic gets cheaper if you've got Evocation and Thaumaturgy. Then you're basically just buying the Extra Benefit as a stunt. Easier to justify, optimization-wise.
Refresh may not exist in-universe, but free will does. I have no trouble imagining that a wizard is going to have an easier time saying "I'm not going to endanger my free will to gain the ability to turn into a demon-bear! That wouldn't even be all that helpful," than saying "I'm not going to endanger my free will to gain awesome magical abilities which will help me protect myself and those I care about, defeat my enemies, and generally be extremely useful."
The demon bear thing is actually pretty great, though. It just costs, like, fifteen Refresh. And I don't think the numerical value there corresponds to anything in-setting.
For the magic-ier Denarians, I'd be inclined to say that Denarians can just give their hosts Refinements and other classic spellcasting bonuses.