Yep, we fucked him up. After we had a 2%, 9% and 13% wipes earlier in the week we one shotted him today and looted our long awaited 3 badges. And, yes, before you ask, we did use weird Bulgarian songs to guide us and Cowking did get loot.
Congratulations to everyone, the kill was definitely a deserved one. And although we owned everything there is to kill in The Burning Crusade, we are just getting started! Expect more news from Tupan Techno in Wrath of the Lich King.

The shiny loots were:
[Cover of Ursol the Wise] - Cowking
[Hammer of Sanctification] - Lachlun
[Handguards of the Dawn] - Bulgartus
[Crux of the Apocalypse] - Doko
[Badge of Justice]x3 !!!