No, you have plenty to offer.For back lines RDM has little to offer anymore besides Enfeebling, which is good enough to get us in a party and keep us there
You are good healers
You are good at enhancing magic, and accomodate both whm and sch subs pretty well.
You are the best enfeeblers. You, obviously, have access to the most potent enhancing magic in the game.
You are good nukers for when you wanna play around with excess mp.
Refresh II + Composure / Convert gives you great sustainability.
WHM are great healers, the best.
Good at enhancing magic,.
Decent at enfeebling, slightly lacking in both skill, and obvious magics. Accomodates sch sub well and rdm sub alright.
Nuking? Lol holy2.
AF3+2 pants increase its sustainability but it probably has the least.
SCH very good healers, potent regens, competitive with whm for healing and top-notch for reducing damage (stoneskin, phalanx, weather, barspells).
Great at enhancing magic, accomodates rdm sub the best, but only because whm sub has little to offer it, neither does blm sub.
Good at enfeebling.
The best capacity for nuking any healer has, but, of course, it comes at the expense of stratagems, and Arts on 1 min cds. Not a huge cost, but a cost.
Sublimation and proper use of stratagems making costly spells cheap, give it top-not sustainability. An sch played greatly is an amazing thing, but if you don't know what you're doing, you're going to be with a sublimations-breath of oom pretty fast.
BLM, why not.
Heals for crap, and slow, needing whm or rdm sub to even be worth mentioning.
Enfeebles well.
Good nukers.
No sustainability.
Each mage is good at things and bad at things. You're not the best healer, but sometimes your potent enfeebling is what saves the group. You're not "worse", you approach the group from a different perspective.
WHM is a reactionary healer, sch is a preemptive healer, RDM is a little of both. Doesn't make it less.