Originally I did have a mechanic that would have X2 recognize when she had all the probes, but I couldn't get it working for the Jam version and it's been back burner since (sorry it's been such an annoyance lol)
And I also really like the buff idea, though I'll have to toy around quite a bit to get it to work. Having it heal just a little is also a pretty good idea, I might combine them!
As I mentioned above, I'm sorely lacking in rpg maker combat experience, so balancing them might be a bit of a headache, but it'll be good experience for sure!