Summoner's MP issues

[Yenn]

Is there any chance of having this addressed? SMN suffers from severe MP issues in longer encounters. We burn more MP than we recover in a standard DPS rotation; if there are adds that we can't use Bane on, it's even worse.

Twintania is a great example of this; we literally run dry here, unless we have double BRD, at which point all we can do is chug an X-Ether and get three more casts off before going up to melee Twintania until the next Aetherflow is ready. And then reapplying DoTs and promptly being out of MP yet again. Compounded on the long duration of the encounter, we have to constantly apply DoTs to the Dreadknights, which runs our MP into the ground very fast.

Other classes don't have to deal with this. Melee have Invigorate, which generally keeps their TP up well enough that they don't run dry, and even if they do run dry, they can still generate much more damage than a SMN can. The other caster, BLM, has unlimited MP.

Possible solutions would be to lower the cost of our spells or increase the MP gain of Aetherflow.

Basically any help would be great; it's silly that I have to interrupt our BRD in the last phase of Twintania and ask him to give me MP, while the three other casters are still nearly full on MP.
This is wasting time that he could be using for Foe Requiem, if I were any other class.