Gear level can attribute some of your difficulty, especially if you haven't upgraded your weapon in a long time as Magic Damage is a huge stat for any damage or healing related numbers. If you can upgrade your weapon, do so.

In terms of actual play, are you making use of Lucid Dreaming? As mentioned earlier in the thread, you should be aiming to use that earlier in the fight so it's consumed and ready to come back out for more MP earlier in the fight for you.

The other thing I have to ask is are you using the Benefic II proc a bit much? Unlike WHM Freecure proc, ASTs Enhanced Benefic proc makes Benefic II a guaranteed critical. You mentioned in the opening post that you are...:

Quote Originally Posted by Aikeiko View Post
using using Benefic over Benefic II unless I get the buff for Benefic II to be free.
The comment leads me to believe that you have mistakenly thought that Freecure procs and Enhanced Benefic procs are the same when they aren't. And if you're using Benefic II every time the proc is up thinking it costs 0 MP, I can see where some of your MP issues are stemming from.

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Also going to randomly comment about another post:

Quote Originally Posted by OcieKo View Post
Side note on Essential Dignity it was changed awhile back to be a less gradual healing buff, now it just leaps at 50%/25%, it no longer heals for more at say 5/10% hp than it does 20/25%. So while its still true just less extreme on the conditions.
Do you have any patch notes and/or research on this particular change? I don't recall ever reading about any changes since this research was done back in June 2015.