2. Additionally, classes without a threat dump you may want to assign to Riplimb after Rageface dies so that they aren't building up threat on the boss which they can't get rid of later. Since this is often melee classes (DKs and Warriors) this puts even more targets for Crystal Prison Trap closer to where you are.
Prior to the Rageface dying, the only one who has any restriction to being some set distance from the boss is the main tank healer(s) because naturally they have to maintain healing range. Everyone else can be further than them or closer to the OT. Since the range between Riplimp and the boss will be somewhere between 50-60 yards, even when DPS switches to the boss, those ranged DPS with 40 yard range can would still be closer to the off tank's position.