To compensate for most of the lag when there are 50+ players/necro pets on the screen at the same time, you can remove their name tags/details using this script (and enable them again after).
Right click save this file, then put it in your age of conan\scripts folder.
http://software.requiemnex.com/scripts/fps.txt
Once it's in the right folder, in the chat window type /fps.txt
To Funcom, are you aware that when someone tries to zone into an instance that is "full", their game client crashes (gets permanently stuck) on the load screen/generating content?
Steps to reproduce:
1) group with a friend that is in the full zone
2) zone into same playfield
3) press YES to the box that pops up to join your friend