My Moogle parses are around 35-40k (I'm experimenting with gear and I haven't got all the materia I need yet), while Archers do around 50k+ each and CNJs about 10-15k (Stone ftw). By the end of Phase one, my damage is around 15k, which is usually tied with the archers at that point (Phase 2 the gap widens).
The only time I run out of MP at moogle is when I get raped by MP drain. Otherwise I can keep 1000-2000+ MP easily during phase 2. During phase 1 I have full MP by the time Memento Moogle is used. Blizzara and Blizzard are useful for the enfeebling effects, not the damage.
THMs are good because Moogles need to die quickly, and the second phase of the fight an instant Thundara for 800-900 damage to kill a moogle before it gets a cure is vital.
THMs aren't likely to win parsers, but if all you look at is pure damage and not utility, then you're picking classes half blind.
I would like it if it matched Dark Seal's cooldown, but it isn't really necessary. But I wouldn't complain if this was the case. And if SE alleviated the MP cost for magic combos, I wouldn't mind either.
I'd actually like to main the strongest class in the game. Because that's what THM would be without high MP costs.