You can kill all the avatars if you wish. But you only get loot from 1 avatar that's it. After you kill a avatar there is a chance that it can spawn Bristlebane.
Bristlebane
1. Jack in the box, tank needs to move it away from the box. Once 4 up, kill all four.
2. Easy swarm adds
3. Jester adds - Damaged by 1 of 4 things - /Dance; /taunt; 3 mage dispels; or bard right clicking - it will emote so you can tell.
4. Doesn't really take damage in the first half of the fight - need to use the bombs. The fake one - can't be used, he gives clues. E.g. Race (size), gender, archetype, class.
5. Throw fake bomb - wipe.
6. More jack in the boxes and swarm adds. Kill them and he starts taking damage.
7. At least 2 curses (more if people get by the boxes). Can just leave them unless need to throw a bomb - shiny distraction.
Now it would be good tho no matter what to kill all the avatars so you guys can get some practice in for all of them.
