Addendum

Their relationship with dream mages is that they're always pranking them, naturally.

Splitting Into Camps

Do you think thunder and lightning mages are different people? If so, do they get along? I bet they are different and wish people would stop presuming they have some kind of relationship more intimate than what they have with dream mages etc.

The Big Drawback to Including Oneiromancy in Your Story

It sounds like it should be something filthy. Now that I think about it, it probably is a lot of the time.