On my Shadow I did this at 26, but had a guildie help me many many months ago.[since my Shadow is my main, lol.] Today, I am on my 29 Sage, and took him down pretty easily, despite him interrupting mostly what I threw at him. All I did was use Restoration to take the debuff off either Qyzen or myself, and even if he was channeling Force Crush, he didn't take either of us down. I forgot to throw Restoration on Qyzen when Vivicar was at 2%, and yes, I kited him around the room throwing Rejuvenate and Force Armor on myself, and then casting boulders as I went. 8 out of 10 throws he resisted, but I got him. It's definitely doable by yourself at 29, [and this is directed at GamewizX] if you know how to play your class, and hold out on the resists.