Actually SMN hasn't been constrained by MP since HW, and even then it was only because Ruin 3 cost 1000mp outside of Dreadwyrm Trance.
And in reality it still wasn't really, unless you combined it with a LOT or ressing, which even throughout the Editions I don't think I've done much Ressing with SMN.

RDM though I've done a ton of it, and its the only time I've ever run out of MP on any job other than BLM. Most jobs haven't been constrained by MP since ARR when the amount of HP really was limited due to level.

Still the only job I've ever played where MP came into play repeatedly was BLM.