How to Dragoon per Second: A DPS Paradigm

[PheonixCain]

doing above 1600+ on dummy and clear A5S SSS with 2-3 sec left (no food nor pots, didn't pop B4B at the very end, but feel like i should), currently at i217 with Sephirot spear crafted chest, belt and earrings, the rest are midan 220 gears except the eso feet and neck, and a gordian ring (although i haven't melded anything on the midan 220 gears). now, we are hitting enrage in A5S, which 3 of our dps were around 1100-1000 (maybe it's our party comps, we have WHM and AST while WHM was the dps healer and AST was full time healing), but anyhow, i just wondering what i can do better and what's the next piece i should get from lore tomes, or maybe i shud save them up for the weapon since we are actually progressing in Midas now...