In that case, BLM still looks good. After about level 40, we can use a single spell(fire 3 or bliz 3) to go to a full stack of whichever stance we need and to switch back and forth. Our most important buff can now(thanks stormblood!) be kept up indefinitely if you just do your normal rotation, but even if you lose it somehow(usually poorly timed forced movement) the recast on it is only 30 seconds from when you first apply it so you can get it back in a hurry.

Otherwise, SMN isnt a bad choice. Another class with a good balance of aoe and single target damage potential. Aetherflow notwithstanding.