I'll add my two cents. I just beat this literally 2 minutes ago. My game is all patched up and everything. I had two lone wolf characters. Both toons were level 21 for this.
My first toon was a Rogue with some witchcraft and Aerothurge.
My second toon was a full on sword and shield warrior
I wish I had known I had to protect That chick before going into the fight, I failed many times cause it's almost impossible for a rogue and a warrior to hold everything off of her, and she is a retard who wont heal herself.
Basically what I had to do was stun the dragon and hit him with everything I had. I used Inspire and nullify resistance for all enemies on my warrior. (Note my rogue has a stupid high initiative so my stun went off before dragon could summon)
When the first stun was about to end I was able to knock down the dragon with my rogue. two turn later I used both my lightning spells from the rogue and landed one more stun. This allowed for the kill
I was able to end the dragon in 5 turn of pure dps on him. I did get lucky though if any of those stuns failed I surely would not be writing this message now.
My advice to anyone who can, bring a healer to heal the chick, and maybe make her invisible.
