With an increase in rank 8 characters, we are seeing more and more instances of players going out with both a rank 7 and rank 8 mob, essentially being a portable patrol to smob with. Since this is a multiplayer, a multi-user if you will, game, activities should be more about the players, than the NPCs being dragged around.
Therefore, effective immediately:
Any rank 8 can only lead one rank 7 OR one rank 8 mob.
Children of the Light can only lead one rank 7 OR rank 8 mob AND ADDITIONALLY one rank 5 mob. This is considered their clan bonus and therefore exception.
From the Staff's point of view, there are enough smaller scale activities to be done that don't require the use of a portable patrol.