Well, at least some of the issues in this thread are working fine now after recent fixes I made (such as mercs being able to zone again now).
Their stances are not supported yet, as that will require extra code to make them behave differently depending on stance and that hasn't been added yet.
Last I checked, healer mercs healed fine, but there were some very recent changes related to merc casting code that may be causing issues. I haven't tested it yet, but if may be related to this change:
https://github.com/EQEmu/Server/comm...011665d5105e76