Shield - Sporeggar's Shield. Once you get the rep.. 10x mushrooms takes 2 minutes to collect for the shield. It's not unique, so carry a few of them, throw fel iron shield spikes on 'em, and block away. The rep grind isn't too bad.. I cashed in bog lord tendrils as far as I could, grinding more for an hour or two, did the few quests for rep, then ran UB two times for the shrubbery quest and a 2nd turn-in of sanguine hibiscus.

If you're looking to AoE boost other toons with these guys, you want high damage return (shield with stats like Sporeggar's Shield, plus shield spikes), high block rating (to return more damage), and high block value - AoE boosting involves taking a TON of small hits, so high block value means you'll take very little damage from many of these hits. Don't neglect high spell damage - consecration dishing out 150-250 dps per tick is slick when you've got 40 mobs on you. Bring lots of water to refill that mana after a couple pulls - a few consecrations and you're OOM, but you deal a ton of damage with it.

Also, I'd avoid using epics to save money on repair bills. Stick to good blues with + shield block rating, +shield block value, +spell damage, +defense.

Edit:
Trinket1 - Figurine of the Colossus. Keep those blocks up to dish out the damage and reduce incoming damage.
Trinket2 - Darkmoon Deck: Vengeance. Dish out more holy damage, and you don't even have to block for it to proc. +51 stamina is a plus. On most servers, you can buy all cards for around 1.5k-2.5k gold total. Roughly 10 damage returned per hit received.