"ROGUES. Weakness: Warlocks
As every experienced Warlock knows, rogues have an inherent need to kill Warlocks. Whether they're killing a healer in battlegrounds, or DPSing the boss in a raid, all rogues will drop whatever they're doing if the opportunity to kill a Warlock presents itself. Through great effort, however, we have invented a way to turn this, Warlock-kind's (Warlock-cruel's?) greatest frustration, back against the rogues. We call it... the Buddy System.
"The premise is simple: Rogues exhibit behaviors indicative of a mind that can only process one thing at a time. When a Warlock is sighted, any previous action is dropped and replaced with the desire to kill that Warlock. From this we might conclude that "Kill the Warlock" is the highest prioritized thought a rogue can have, and supercedes ANY previous thought the rogue might have had. Keyword "any".
"So what happens if TWO warlocks are seen? As our superior (and evil) minds might expect, the rogue becomes stuck in a loop. The Rogue moves to kill Warlock A, but this thought is quickly overridden by the need to kill Warlock B. However, once moving towards Warlock B, the need to kill Warlock B is again replaced, and Warlock A becomes the target once more. Using this method, two Warlocks can effectively juggle a rogue for hours, until his or her existence bores them, at which point they may finish him or her at their leisure. Additional Warlocks may be added for extra amusement.
"WARNING: Groups in excess of three may cause the rogue to explode. This is awesome."