After some additional research, I think I know whats going on (Need to try it out today though)

- The beer does NOT prevent the kegg, it prevents a straight stun. (Brought in another toon yesterday which didnt have the /use beer thing, and she got stunned, not kegged)

- The elite will kegg the highest aggro target 16 secs after spawning, and will keep kegging. (wowwiki.com/Coren_Direbrew)

This explains everything I was seeing. I was using beers like mad, still get kegged. And would typically get kegged at around 20%-15%ish, so that means "everyone else" has the DPS to burn him faster than I do. (Chain heroism, drums, I put out about 700-1000 DPS, keep in mind CLs hit adds making that an inflated number). I dinged about a week ago, so only sitting at about 5-600dmg on the Elemental Shamans, and I run with 1 Resto, 3 Elementals, 1 Protadin.

Further backing this is a forum thread on the same topic :

So, my thinking now is :

- I dont have the DPS to burn him down before she starts kegging, so I need to kill her the second she spawns. This will prolong the fight, as she respawns fairly fast, and I will get mana issues

- I dont have the gear for the shammies to tank him while I am kegged. Sitting at 5K health, they take 2 hits from him and are history.

But, will try today to burn her down as soon as she spawns. If that doesnt work, I will pop an Earth elemental in a corner somewhere, drag them all over to the earthelemental when she spawns, drag the boss back out of range again. That way I have an earth elemental offtanking her for the duration. But sounds complicated ;(