Geomancer

[MirronTulaxia]

Tank would shock me, if just because it’s right after another Tank, a magical tank, and puts the category up to five jobs which is more than I expect. But the other two definitely don’t surprise me. I kind of imagine Totem-like things to tie in the terrain effects too, it’s hard to think of a viable method otherwise.

Edit: Oh, but I do like your idea for a magical tank/heavy caster. It's also the kind of thing I like at times for Black Mage. It won't happen, precisely because of how they've built the roles, but it's nice to imagine.