I just got my hunter,Hek (gul'dan), to level 80 recently, and decided to switch from BM to Surv. I can do very good boss dps (though its fight dependent), but i cant seem to keep my dps for mob pulls, more specifically wave based mobs (such as in HOR). I find that in single targeting ads such as the priest, ill do a good bit of burst, but once i start target switching (to the other ones close to dieing) i lose alot of dps. now i do tend to keep shooting away so that im at least doing some damage, but singe mobs consist of a fair amount of damage and it looks bad on charts, which gets me complaints. can anyone help me with what i should and shouldn't do?

*I tired to include my armory link but i was having issues, feel free to help/show me how!