And here I thought it was Puppetmaster.
...because of that line about how much easier it would be to clean and sort the stock room if she had mammets to do it for her.
Could be either. I've been on team GEO for a few expansions. But also GRM.
I think GRM is something people are thinking because (a) AST quests suggest that GEO is a similar thing to ASTs, (b) GEOs in game used WHM 1-handed wands and cast CNJ spells, (c) CNJ/WHM (prior to ShB) have elemental magics which GEOs would probably use, (d) that the SMN rework removed the most DoT oriented Job in the game, and in theory it could have been done to free all those interactions and mechanics up for a DoT focused Job, which GRM would, in theory, be. Also, TMNT are green (turtles).
I don't know that anyone's "sure" of it, though. I was thinking Pictomancer was the generally believed "new caster Job", though. Personally, I don't see it, mostly because it might need some pretty new mechanics (contrast RPR and SGE which basically did what existing Jobs did, RPR following the pattern of various upkeep buff builder/spender play that a lot of Jobs use, and SGE mugging SCH and stealing its homework for the prior 2 years), or if not, just be an existing caster with different visuals (which isn't really what Pictomancer was, but then...SGE isn't really true to its "advanced magic Red Mage that forgot how to melee" roots, either). I just feel like at that point they'd just go Puppetmaster or something.
Geomancer is the safest choice, since it could just be a Nature elements (Earth, Wind, Water) Black Mage or an inversion of the RDM where it does melee stuff to build up to a big cast sequence, though RDM kind of already does that (it builds with casts, but then does melee to build to its big spells) as does PLD in the Tank role (Confetti Swords combo).
Green Mage is the second safest and, perhaps even more no brainer choice if they've gotten over their abject aversion to DoTs (which they're supposedly averse to yet slap a new DoT or upkeep debuff - or two - on every new Job they introduce... <_< )