when you pull Corsolander position him where his tail is sticking out of a side one of the side walls so the raid force is on one side and the MT and Corsolander are on the other will allow your whole raid force to attack him in melee without getting hit by the Damage shield. allowing a quicker fight. It is important that the Melee'ers stay behind the wall(nothing worse than seeing a scout take 800 points of damage for every hit they do to this guy). I know this may seem like a pain to setup but once it is setup Corsolander goes down quickly.
Corsolander is a named mob within the The Laboratory of Lord Vyemm
he isnt a hard pull but has a 800 to 1000 point damage shield so when fighting and not using this way the fight is completely done with ranged combat and can take considerable time and hard to hold down because the Main tank must taunt and not hit him too much due to the damage shield. it can be a long fight, but if you do what I have laidout here you can shorten the fight and give those melee's something to do while the fight is going on.
http://eq2.ogaming.com/db/bestiary/TheCorsolander.php
M = Melee and raid of the raid force
C = Corsolander
MT = Main Tank