[Ziero]

Terro Anima sucks, don't even bother with them

All Promy bosses have a naturally high resistance to Magic, so nuking it to death is harder then it should be.

And you need a lot more pure DD then the two you have, as Dnc Dmg is not that great at 30. The Whm and Rdm are more then enough to cover healing. I suggest getting either a Pld, Nin or War/Nin to straight tank the boss and getting another heavy DD (Sam, Mnk, War, Drg, Drk, Smn, Rng etc etc) in place of the other Dnc.

Everyone should have Hystero and Psyco anima. Again, Terro is all but useless and more of a hindrance unless you have an all Blm set up. You also want to set up a proper order of use, everyone should know when they are supposed to go. Start off the fight using the Psycos to give yourself some 'free' damage on the boss so you can make a dent in his hp, at 60-ish% that's when you start throwing Hystos and have your heavy DDs go all out.

Make sure you save at least one Hysto for when he is almost dead as the lower they get in HP the more they use their specials. These guys have *infinite* TP so they can, and will, use their specials back to back to back to back. And in dem, one or two babies aren't a problem, but if left unchecked, he will pump out enough to swarm you...and the babies ALWAYS go after the healers first.

Long story short, more DDs, and a defined tank. Hysto/Psyco anima, no Terro. And make sure everyone knows when to use theirs, go too early and it's wasted, go too late and you're dead.