105 Silver Mage. Air pet and healer merc.
Beware of this one, the adds can be a pain. I got through quite a few bulwarks, pets, mercs and rezs before I could tick this one off.
I even got the help of a passing 3 boxer (100+) who nolchalently said "it's only a light blue, what are we waiting for?". His tank went down in seconds and we all eventually became carpet fodder.
With hindsight, the secret is to take out/contain the first two adds before the rest pop later. Simples?
Quite a regular spawn though.