this build you don't die if you pull aggro .. but if you're doing you're job properly you won't pull aggro. simple as that .. download a threat meter.

Heroic strike is a high damage rage dump that turns one of your white damage attacks into a yellow special. yes it causes a high amount of threat but if you spec imp zerkers stance (going that deep into fury and not is just pointless) then you also have a 10% threat reduction to your abilities. Trust me you aren't going to pull aggro off of a good tank. I spam all my abilities including HS (by the way it works with windfury too) and don't pull aggro even if I don't have salv.

as far as the imp zerker rage .. its basically not needed. I never have a problem with rage and don't ever take that talent.

also for raiding purposes this build needs to be tweaked a bit. At least 1 dps warrior in the raid should be taking 2/5 imp demo shout and then put the other 3/5 in unbridled wrath for raid utility. the 2/5 imp demo shout will basically negate any + AP that a boss mob will have so he won't hit the tank as hard.