Let's say you are en Enhancement Shaman. You have 179 Str/Agi, 20% Atk Spd, 10% AP, Wisdom and Bloodlust
Let's say you are a Frost Death Knight. You have 155 Str/Agi, 20% Atk Spd and... yeah, that's it.
I can go on with every class/spec in the game and Shamans will win the buff-race against all of them, except for maybe Paladins. Also, "bring the player not the class" tells you anything? My guess is taht you are either a troll or you really suck so much at playing your class, that your buffs are the single only reason you are invited to raids. Either the reason, I feel sorry for you.