First time with Doan was like .... OH SHIT WHAT HAPPENED ...
His blastwave doesn't seem to end somewhere, you can only survive it (which didnt work for my first try, all my toons dropped from 100% to dead through it) with LOSing it, your tanking him in his room (in the middle) and all your toons standing in front of the small hallway to his chamber ... strafing left/right do dodge the blastwave makes this fight easy.

This is the way I do it without wiping once at him since them. I did it with level 31 by the way, so my toons had almost no stamina at all. :P But its possible the way I described.

Xorn