Resond time is VERY quick (58 seconds). Sony, you did us a favor this time. :) We had 3 toons and 3 mercs in a group. We needed 3 envelopes (Archon Eries Documents). One for each toon. We were expecting to have to wait a normal respawn time of 16 minutes. What a pleasent suprise to have the Quartermaster repop so quickly. It was just enough time to loot and reposotion for the next round.
Oh, one more tip. We pulled him from the room behind him.
Only dropped 1x Archon Eries' Documents, but respawns after about 30 seconds from his death.
For both the first two kills we had a sarith guardsman add from the neighboring room with a bed. The guardsman is normally laying down and both times seemed to add at around 70% (though might have simply agroed through the door?). For the third kill we tried a different approach and beat the guardsman down to the point he began to flee (3%), snared him and then engaged the Quartermaster Gilles. We were then able to kill Quartermaster Gilles alone for two more drops, before finishing off the guardsman and leaving. After checking track some 5 minutes later the Quartermaster was back up, but the guardsman was not, so if he does cause a problem for others, then killing him before engaging Quartermaster Gilles may be an alternative approach.