BLM can get 7/tick auto-refresh just from gear if they want to:

Owleyes (Though a lot of people hate wearing this)
Wivre Hairpin
Goetia +2 body (2/tick)
Moonshade Earring
Serpentes Set
Stearc Subligar

Certainly a lot better than the 1/tick we could get before Abyssea came out, but yeah you can still burn through all your MP (especially outside abyssea) in no time at all.