So... your DPS on bosses?
Rotation wise, scrap Oblit... Blood doesn't use it. Heartstrike is where it is. Only use IT and PS to keep up the dots, pop a DS, and HS spam... DS is only used to change runes to death runes, HS every chance you get. You should only need IT/PS once every other rotation.
Spec wise, why do you have Bloodworms? They don't do that much DPS and the points would be better spent in Unholy for Epidemic and something else.. maybe Corpse Explosion or finish off Morbidity.
Change out those glyphs too.. Since you shouldn't be using Oblit anyway, try Blood Strike, and maybe Dark Death.
http://talent.mmo-champion.com/?deat...4&version=9767 is actually the spec and glyphs I use. Rotation changes based on what I'm fighting but usually on bosses it's DS - IT - PS - HS - HS - DCx2 - HSx2 - DS - HSx2 - DCx2. Drop some DCs if you need to. UB in place of a DC whenever it is up.
You can drop in Hysterias whereever when the CD is up.