It's a steep gear check for Marrowgar 25 HM. If you aren't doing current tier heroics, you will not be able to out dps this. I'm in mostly 522 gear and can only get him to about 25% of his health. Midwinter's prot paladin who is mostly best in slot, beat him with just a few seconds to spare. Bubble/BoP do not work and you will get impaled through them. The only way I know of to avoid getting impaled is to be a goblin/worgen, which isn't possible for us paladins. Best bet is to wait until the next tier for the majority of us to be able to do this fight.