Quote Originally Posted by Sservis View Post
I think the sentence about druids not being able to enter the paladin's hivemind is likely wrong, but I don't have personal testing to validate that.
You are only allowed to group up into the Hivemind mount with the other characters you did the questline with, but there was a bug early on that allowed you to enter into others' Hivemind mounts when not having done the quest with them, or at all. Furthermore, if you want to change the set of characters who can group up into the Hivemind together, then you will need to redo the questline with that particular set of characters (it is repeatable).