WoWDB

This is a personal achievement that requires three separate kills.  The three mantles each person must earn are the buffs received by clicking on the dead Paragons.  Each buff is only available to particular roles, can only be picked up by one raid member at a time, and only one buff can be picked up per player per fight.  There are four options for DPS, two options for healers, one option for tanks, and two paragons whose buff can be assumed by anyone.  This means that over the course of three kills:

• Your DPS will need to pick three different DPS mantles.
• Your tanks will need to get the tank buff, as well as the two generic ones.
• Your healers will need to do both of their’s, plus one of the generic ones.

Work out in advance who needs which buffs and try to assign people Paragons so everyone gets a new buff for each encounter.  If you have multiple people with offspecs for other roles, you can have people swap roles to increase their options.

Note that if you do this on flex, you can complete this achievement on the same night by just re-queuing for that wing three times.