Few times when i was going thro main mission there was instances with elite mobs in it and ppl only with quest are able to go in and help.
What i suggest is to make it so you (who have q) can inv friends to help you out, coz in time it will be very hard for newcomers find 5 ppl for Selfless Nature (q) (as example)
Even now its taking more then 1 hour to find 5 ppl in that cave and no one other can help you.
**Support post if you agree **
Thx for attention.