Monk epic questions

[llgreyfoxll]

I just recently downed Eejag and I have some questions about the next few fights.

To spawn the next fight an item from a previous fight needs to be turned in to a specific mob. For example to spawn Gwan "Charred Scales" must be turned in to "A Presence".

Are these items eatten on hand in or given back? I plan on doing these fights with low numbers and am concerned that failing to kill a mob will result in having to do all the fights over again.

Do the mobs depop? The wiki states that Vorash and Deep will depop if not engages after 80 minutes. Does anyone know if Xenevorash, Trunt or Gwan despawn after a certain period of time? Or do you have plenty of time after a wipe to rez/buff up and try again?

I believe I read somewhere that Xenevorash's AE can be avoided if attacking from max melee range. Does anyone know the validity of this claim?