killed it with 3, 70 beastlord and druid, both fully coa geared, and little 67 mage box. Beastlord was tank, close to max aas and 35% melee shielding ( hero sta ). was easy.
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hunter Roxas Nitehowler Plainswalker of illumanati MM, EQ
This guy also dropped a ranger useable wrist item. It can also be used by a couple of other classes. I was on my cleric at the time and no one was in the group. It rotted and I can't remember the name of it.
The last time I was involved in killing Warlord Drellak (I don't recall the date), he dropped Drachnid Champion's Chestplate.
It used to be relatively unremarkable, having roughly the same stats as a Magnetic Breastplate. After the most recent patch, however, it appears to have been...upgraded.