Of course I can't say the stats listed as of yet, or if it will work or not, since I have taken these skills from scanning through Guild Wiki and made a concept build focused on energy maintainment while getting your enchants to blow up as soon as possible. As of now, the only weapon I'd say you need for sure is one with a Zealous mod on it. This is only being posted for anyone who may be confused about the Dervish and want a build to try out. Criticize if you like, or flex your muscular ego with your 1337t4ztik build t0tly pwN1ng mine. Either way, here it is.
Stats : hell if I know
Pious Renewal [elite]
Heart of Holy Flame
Aura of Thorns
Ressurect / Rebirth (whichever you prefer)
Descrition: Ok, again, this is only a concept, so my explanation of how it "works," is only a half-assed guess. With the zealous mod, you are able to build up your energy capacity with each swing, so yar, that's a good thing. How I envisioned it, get on extend enchantments. For BLAH seconds, whatever enchants last 100% longer, and after BLAH seconds, this enchant ends. when it does, all enchants on you are removed. After this, use pious renewal, for BLAH seconds, every enchant on you that is removed gives you BLAH hp and BLAH sp. While these two are on, get on all your other enchants, and if you run out of sp before then, Lyssa's Assault, giving you (forget) energy so long as you're enchanted. Wait for extend to end, all your enchants go bazan bazoom, and you reap the benefits from vital boon and pious renewal while the rest do their work of AoE damage. Ok, if anyone sees any flaws (as I'm sure you will, because I know there are), point them out and flex.