if it indeed was Durn the Hungerer, I must agree - he hurts like a ton of bricks... when I did him first on my hunter, I had a pally tank and shammy healer + 2 other dps in group and he went down just fine, even though we were in greens... hooray for plate dmg mitigation

We were lvl 65-66 at the time, but all very experienced players who had played together for years on different classes....

When we hit lvl 70, and had grabbed the first few Kara pieces + 1-2 badge pieces, we went back there to try it for fun - me and the healing shammy 2manned him, BM specced hunter-pets are just amazing tanks... But this was like 30% epic gearing, which is what really makes the difference.

All in all, form a 5v5 arena team. Do it now, dont wait for it. Play 10 games. In all likelyhood, you will loost 90% if not 100% of them. Collect your 300-350 ish arenapoints. Next week, disband the team and make a new one to reset ratings. Rinse and repeat. In a month, you can buy the S4 Gloves, requires no rating, just 1125 points or so. In the meanwhile, grind battlegrounds and if possible as many dailies as you can take. Accept the ganking, it will happen. S4 Belt for honor, also requires no rating. Buy S3 offpieces aswell, they are only 4% weaker than S4, and require no rating. Once your health goes up, your resilience and spelldmg follows, and you will see your 16 dots suddenly eat away opponents health, as opposed to now.

But it takes time and patience. There really is no shortcut, the rogue and druid who ganked you, probably have 30-50+ days /played @ lvl 70. Even as a MB'er, that is hard to catch up to.