Not 100% sure how my old guild did it but they used to do it this way:
Bard/SK pull out the Aspect of Protection out. Kill him. Next pull out Tshara, you should be able to get Tshara single not too hard pull him up the ramp and tank him there. No need to worry about the other projections. Kill Tshara, done. Now what happened while we killed Tshara, like did that bard kite them or something I dont think so. I just recall us always pulling them this way. Very easy strat.