Ok this mission is actually really easy if you know a couple tricks and make a few adjustments to the mac ini's.
I dont know how you normally play and my group is a little different but it should work pretty much the same.
For your group lets use the 2 wizzards and the ench to kill the boss. The War,Clr,Mag should be able to handle the rest.
On the 2 wizzards and the ench in their ini set
AssistRange=200
AutoAssistAt=100
UseSmartAssist=0 ( mobs does NOT need to be in melee range of the tank to start attacking )
For the 3 that will be down below set
UseSmartAssist=1 ( mobs need's to be in melee range of the tank to start attacking )
Drive the tank and use manual targeting using your xtarget window and
mq2map. Start and fail the event ( kill the adds but dont attack the boss, it will time out ) you can now get past the barrier and pre-setup ( worry about achievements later, lets just get the first win ) Run the 2wiz and ench up the ramp in the middle and stay on the ramp DONT go on the platform, your gonna range dps the boss ( it does not summon ). For the 3 at the bottom MOUNT UP! Mounts negate the tornado effect and lets you chase mobs down as they spawn, dont pull or wait on them to path just run them down and engage asap, they spawn on a timed interval so the faster its gone the more dps time on the boss. Start the mac's with everyone assisting the tank, The boss is immune when adds are up! Start the event and kill the first 2 mobs, the 3 up top Wont have LOS, they will target the tanks mob but they wont cast anything ( you want them not casting when adds are up or they are wasting mana ), when the adds are down use Xtarget on the tank and target the boss, the boss is too far away from the tank for the ones below to try and run after it to enagage and the 3 up top now have LOS, are allowed to assist at 100% and dont care how close the mob is to the tank to start attacking! Use
mq2map with spawns showing to target the adds asap to stop the topside dps and chase em down fast, fighting on mounts is a bit strange but it works great! The ihc mercs should all follow the tanks target automatically, I'm not sure how kiss will react to targeting the boss up top when its bellow assistat% so you may need to make a
/backoff key for the mage.