In regards to the "other Jaguars" matter, you're pretty on the nose I think - if you play it as your splinter tribe being different from their's, it should be fine. It might even drum up some interesting interactions if you want to roll that your tribe might've heard of theirs in passing or vice versa!
I also agree with Perth's suggestion. I don't know about others, but usually if you can explain the "how" well enough, I'm willing to try rolling with just about anything once. So if you can figure out the "how" of your character's knowledge of White Magic, I think that'd be beneficial.
If you need help for the how, well, a few things that come to mind for me are:
The last idea does actually touch on the 60-70 WHM quests, so I'll leave it in spoilers here rather than just blurt it out. It's a bit lengthy, though, and rambly - as is my wont - so... yeah. Anyway.
I also agree with Perth's suggestion. I don't know about others, but usually if you can explain the "how" well enough, I'm willing to try rolling with just about anything once. So if you can figure out the "how" of your character's knowledge of White Magic, I think that'd be beneficial.
If you need help for the how, well, a few things that come to mind for me are:
- A WHM soul crystal found in one of the battlefields of La Noscea. Nym was located there, after all, and was one of the three factions in the War of the Magi. It's not too far of a stretch that they might have either obtained a WHM crystal or one could have been left behind by an Amdaporian combatant.
- Rather than have it be full-on White Magic, instead have it be something more unique. You don't have to limit yourself to the classes/jobs in the game. So maybe your tribe's dancers are also healers - the dances commune with the spirits of the land and draw forth healing energies that are like conjury or white magic, but not entirely. Perhaps they wear white to show the purity of their profession, further making the uninformed confuse them with White Mages.
The last idea does actually touch on the 60-70 WHM quests, so I'll leave it in spoilers here rather than just blurt it out. It's a bit lengthy, though, and rambly - as is my wont - so... yeah. Anyway.