I think the giant mob you are talking abou is "Durn the Hungerer". Go to one of those camps where they have the elite felguards and enslave a few of them. You will have no problem taking that mob down. Those felguards will be a totally effective tank and I think they each hit for about 1200 to 1500 crit. I don't have anough MB experience to help you with the rest but Vyndree has a great video on boosting with a prot pally.