I was thinking of making Bartz a Geomancer, but I really want him to be a Mystic Knight.

Geomancer long enough to learn the detect holes in floor thing and then switch?

Since that's the only ability of much value that they get

Yeah, those are good abilities.

Idk what to put Lenna in though.

I put Galuf in the Ninja class and Faris as a Summoner, but I'm kinda torn Black mage and Time mage for Lenna.

I mean, I already have her in the White Mage job, but I want her learning more abilities.

Learning time mage abilities'll come in useful later, since if you have a Ninja and Summoner you already have heavy hitters covered

Hmm... Ok.