Found this on the main monster play forum if you didn't see it; posted by a top dogs in the LOTRO work force. What you think about it? Right? Wrong?
Ettenmoors - Monster Roles
As promised, here is a description of the roles that monster players are designed and expected to be able to perform while making their way through the Ettenmoors. Also included is their analog on the player side of the fence. It is important to note that initial implementation of all monsters do not directly map to their player counterpart. This is to ensure that we have somewhere to expand them with a minimal amount of adjustment.
Classes are listed from primary damage dealer to weakest damage dealer. It is important to not here that data suggests that the Weaver and Warleader are roughly equivalent in terms of damage output.
Savage, brutal and deadly, the Reaver is at home on the field of battle - and few places else. His swift attacks and ability to dual-wield weaponry make him a formidable foe. When pressed, the Reaver is capable of tapping the strength of his blood to become a frenzied warrior who rains blows on his enemy with frightening speed.
Primary Role: Damage (Burst)
Secondary Role: Damage (Sustained), Debuff
Accurate, vindictive and violent, the Blackarrow employs the bow against foes, striking from behind the front-line warriors of Angmar's army. Employing fire and deadly gifts of shadow from Angmar, the Blackarrow is a potent foe who drives his arrows deep into his targets' midst.
Primary Role: Ranged Damage
Secondary Role: Ranged Damage (Over-time), Crowd Control
At home in a pack or stalking the woods silent and stealthy. the Stalker strikes suddenly and does not offer escape to his foe. Strong jaws, hardened claws and fierce determination drive the Stalker, making him on of the most feared opponents in battle.
Primary Role: Stealth/Scout
Secondary Role: Damage (Burst), Debuff, Limited Crowd Control
On the battlefield, the Warleader shines as a warrior on the front line and inspiration to his allies. Through mocking, humiliation and force of will, the Warleader can inspire the meekest of troops to greatness. His fearsome howls augment his strong arm and shield to make his blows all the more deadly.
Primary Role: Tank, Buff
Secondary Role: Rabble-rousing (Healing)
Cunning, patient and fearsome, the Weaver's home is not within the heart of the battle, but rahter at its edge, where she can best employ her strengths and shield her weaknesses. With poison, clinging webs and the ability to burrow beneath the ground, the Weaver is a mistress of woe who skulks the fringes of battle.
Primary Role: Crowd Control
Secondary Role: Damage (Over-time), Surprise