The last time I checked the botgroup functionality was working..and I haven't made any changes to that code since.
Did you verify that the group had been created in the database?
Target the bot that you want to be leader and type:
^botgroupcreate clerics
With that same bot targeted, add each additional bot by using:
^botgroupaddmember <name> - with <name> being the name of the joining bot.
EDIT: The old wiki page for this:
http://wiki.eqemulator.org/p?Bot_Gro...m=Bot_Commands