there are also other aoe abilities to take into account when to pop sheild block to increase your damage sheild on the whelps also using demo shout, in the rotation will greatly increase your chances of keeping aggro. this is just my 2 cent i glyph into cleaving, blocking, and sunder armor for my major glyphs. the higher your sheild block the higher your damge sheild is going to hit for which is 20% of your block when fully specc'd given that your running mates give you a 2 count to get the whelps to the middle, I pull em with demo shout then get em to the middle with the other tank, then pop sheild block, sheild slam one of them(if glyphed for the extra 10% block) they will all be hitting you grabbing your own aggro on top of ret auro if its up. then TC then back up a bit SW cleave, demo shout again, rinse and repeat you shouldnt have a problem i find alot of warrior tanks forget about demo shout and how much aggro it puts out on its own. Hope this has been helpful.
