This party and I thought up a new brilliant tactic that I would like to share with you fellow adventurers.. We failed 3 times before i came up with the brilliant idea and here goes nothing!
Fully buff party before heading into the circle.
Before initiating the fight against the queen split up into 3 GROUPS.
Group 1:1-2 clerics,2-4 casters,1-4 tanks
Group 2:1-2 clerics,2-4 casters,1-4 tanks
Group 3:Ranged classes or Ranged Abled toons.
Have each group on different sides of the circle hugging on a pillar together so the healer can mass heal their groups. At the same time have the ranged people running around shutting the demon queen, and the casters nuking her with firewall,disintigrate, and scorching ray.
Djinni start popping so your tanks/ranged people should take them out to save the casters mana. The key is to keep mass healing going while blade barriers pass through.
Continue nuking with magic and ranged till the queen is down to 20% at this point, no magic will work your ranged people must do all the work... the tanks can help with throwers/bows.
There you have it the plan worked for us on elite with only 2 clerics mass healing and 2 semi-ranged people...