Hi i play dk, not well but enough to understand it i think, so you are a very low item level at the moment and that means you aren't going to be doing a lot of damage in a dps spec or a tank spec. Blood is a tank spec, not dps... TANK, Unholy is a dps spec, you don't try to round up a ton of mobs and survive, you kill stuff or you die... the end. Yes i know that can change with gear but op is ilvl 800. So obviously when you pull 10 mobs and cleave them on blood dk the damage will be higher than if you pulled say the 2 or 3 you can pull in unholy spec the comparison there is a bit off to begin with. Once again though you are item level 800 there are plenty of resources out there that can better explain than myself what to do to boost ilvl, but do dungeons, world quests that give gear upgrades (even if just for item level boost at low gearscore it won't matter seeing as you will most likely replace it soon) try to start working on the broken shore questline and collecting nethershards when your gear allows, do LFR. Literally anything that can give you upgrades to gear do that stuff... until you're at an item level where raiding will require a higher amount of damage and skill (or pvp if that's what you're into although it's easier to get into pvp with the scaling i think... not a pvper so i don't know so well about that.) you just wanna boost that number and then start to work on specific stats and a solid rotation to make the serious gains. Right now basically Blood = tank, Unholy = damage, go get some fat purps.