Quickest way to do this mission is to use 4 people, 1 pally, 1 cleric, 2 wizzies.
At the start kill the roamers at the zone in and get the two gobboes as pets on one of the wizzies. As you look at the wall with 2 exits the 1st gobbo is to the left and the second is to the right. Once you have these 2, head down the right hand passage on the wall with 2 exits. This will lead you to a cart with a gobbo mage standing beside it.
Get the pally to hail this guy three times. Each time he will give you another spell. Be careful you dont hail too quickly as he will not chain cast and he might be busy casting damage shields on the 2 gobbo pets.
Head down the stairs into the prison. Get the pally to pull the king, two area of effect nukes will kill of the adds, and simply dot the king and keep the pally healed - easy enough. Loot the shard and boots/eye.
After this its time for a big pull to finish everything off. With the pally run out the prison and round to the left, your destination is a little tower that looks out of the water, climb to the top of this and jump off. If its all gone successful you should now have aggroed about a dozen eyes. The cleric during this time should be watching the pallies health and if it goes below 50% cast the area of effect heal. This will heal goes a long way and will put the cleric on the aggro list. The pally should try and run back to the prison but he doesnt alway make it as the eyes have stun and blind. The pally does have LoH which can help alot.
Anyway the cleric now has a huge train coming, with dodgy pathing and all you can sometimes get upto 20odd eyes at once from this pull. Two AE nukes from the wizzies should see them all dead.
Head back to the zone in and your done.