The only person intelligent enough to be RJ is Stiles.

But has anyone noticed , Haffner, who is a member of Visualize , is nothing like any of the other members?

My theory is Stiles is RJ and Haffner is Roy Tagliaferro/Jay Roth

Haffner is sort of Stiles/RJ's 'errand boy' , but Stiles does all of the killings.