The ability to stunlock a target with two rogues is extremely helpful to a group, or if you're just duo-ing. Most stunlocks start off with both rogues stealthed. One rogue opens up with Cheap Shot. Once the Cheap Shot wears off the other rogue does Cheap Shot. By this time the first rogue should have 5 Combo points, which he uses with Kidney Shot (5 second stun). When this Kidney Shot wears off, the second rogue does Kidney Shot. (The timing on these stuns can be greatly helped by either of the StunWatch or CCWatch add-ons) By this time the target is... hopefully dead. Note that many (almost all) bosses are immune to stun, and likely poisons as well.