The entire fight is based around controlling the adds and getting the adds down. Once the initial adds are down the fight is a really simplistic tank and spank and just waiting for the spawned adds to arrive and get off tanked until you are back on the named. Ykesha himself does very little to worry your MT group as long as you have a good setup for the group. Dirge, Chanter, Shaman, Plate Healer, (..warden if you need it) ect..ect...
This is a really hard fight at 80 even with SF AA's and the new gearing. Also, there isn't much information besides here about the fight.
Also, there are two hidden trash mobs in the first room down the ramp towards Ykesha. They spawn if you start going after Ykesha and they are not dead yet. You can trigger them by going to the corners of the statues along the back wall in that room.