I agree, MP's an issue in final coil. The big issue is, SMN MP lasts about as long as a BRD/MNK/DRG's TP but the difference is if you're in a fight where one of those guys needs TP, everyone needs TP, so Army's Paeon gets precedence. At the end of the day, singing Ballad for one SMN instead of Foe's or Paeon is a waste (assuming healers don't need MP, which as of up to and maybe including T13, you never do except when a fight's unknown to the healers).

I'd personally like to see an across the board DoT MP cost lowering, or make Aetherflow a tiny bit stronger for SMN (SCH's fine as is). It's hard to justify bringing a SMN to a lot of these fights over a BLM who'd get Foe's, just because of resources, much like T8.