We tried this last night with the small guild im running over in freeport. It was the Ancient Ring zone over in Antonica. We were group of 33 wiz, 33 defiler, 31 guardian, 29 guardian, 31 fury, 32 warlock.
Actual zone clearing of the goblins was fine, actually pretty good exp on the whole, number of named goblins on the way. Then cleared the main room nameds, then went back and cleared the statue's.
End Boss is 33^^^ Group x 2. He is actually on his own if you cleared everything before waking him up but is a tough sob!. He was hitting our tank between 1700-3400 with flurry / hits. Also knocksback and has an AE stun. Needless to say we wipped twice trying him. First was miserable failure and second was a good try until tank got knocked onto a ledge and it gave the "can't see target" for healers. We got him down by about 1/3rd.
Was a fun zone though, completed 3 quests doing it. Suggest reading the post someone did on here not long ago or the "Ancient Ring Quest" on my website.
Oh and to get a earring +8 int/sta/agi/wis(choice) you dont need to kill the boss. But killing the boss gives the haste ring your after. We shall be returning in a few more levels