SH isn't fun without reliable CC. I'm not sure which multiple-mob pull you're referring to, but I'm going to assume either (1.) 4 groups before the first boss, and (2.) the mobs in the big room between the gauntlet-thing and the second boss.
What I personally do when tanking multiple mobs is something like this:
*. mark CC targets, my own tanking targets and clarify kill order
*. set focus on 1st kill target
*. shoot one of the CC targets (the seduce or poly)
*. target my focus, Shield Slam, Demoralizing Shout
*. target 2nd kill order, Sunder/Revenge
*. target 3rd kill order, Shield Slam, Thunder Clap if clear of CC
*. Concussion Blow if Taunt on cooldown if any mobs run towards squishies (Mocking Blow if all else fails)
Tanking multiple mobs is dependent on smart DPS. It's definitely going to be harder in PUGs because people will most likely just pick their own targets as opposed to sticking with the kill order. =S
I've got more plate than your grandma's cupboard.