Need a little help with my DPSFollow

that build on wowhead is nearly the exact same as what i use (i didnt get toughness, i got black ice), its probably the best sustained blood dps build on bosses, but it's also very weapon dependent.

work on getting the heroic HoL axe drop from loken. its only 20-25% drop rate but its an awesome axe and is pretty easy to get if you have a group to run it every day. Titansteel destroyer is also a good option if you can farm the cash for it. The weapon literally shot me up a couple hundred dps alone.

I'd post my armory but its in tank gear/unholy spec right now. I'm not that well geared (6 or 7 epics in my dps set with mostly heroic pieces) and i'm pulling 2500-2700 full buff in 25 man.

As for rotation, the only thing i could suggest, is first use death coil whenever you get sudden doom procs simply so that you dont waste a 2nd free proc on following HS, the second one is to use obliterates before HS, because it will refresh 2 runes at the same time giving you some extra buttons to press between first and 2nd 'phase'. As blood you should have no more than 1 GCD free every full set of diseases, and thats based on sudden doom procs.
Also remember when to blow your CDs. you should, in this order, blow DRW on boss fights.
100 RP -> AP/STR trinkets (prefereably when rune of fallen crusader procs + abominations might) -> DRW -> Hysteria -> Ghoul -> IT + PS -> Oblit spam (use empower rune weapon to lengthen this phase as oblit crits hard with you and drw do it) -> DC spam > HS spam.

Anyways, get a good weapon and you'll get at least 1800DPS out of your spec.
Make sure you are using glyphs of oblit + icy touch, they are considered the main raid glyphs.

If you want to go raid, you should respec to UH or Frost DPS for your first couple runs. Do vault + sarth every week as they are easy to pug and any gear you get helps tremendously. once you have a better weapon blood's dps will pull far ahead of frost and usually be better than UH.
Good luck.