RJ is Brett Partridge,,,,and i won't repeat what you already talked about
My theory for those who are suspecting Haffner:
There is a fact i want to explain to you:Sophie Miller wasn't killed by Red John,,,if she was,so why didn't we see the smiley face of RJ??and by the way,,whoever killed her didn't slit her throat like RJ...he cut her head from her body,so obviously he isn't RJ.


And what I'm expecting is that the guy she was treating wasn't Red John at all...He was Haffner....so that the (acarophobia thing) is now explained because Haffner is afraid of spiders and that's certainly in case Patrick has heard it wrongly as (acrophobia).
So i think that Red John ordered Haffner to meet Sophie Miller as a patient to get information about Patrick like (the happy memory) and finally he ordered him to kill her in that way which isn't Red John's way.

My money is still on Partridge,Thank you :)