Well, first of all I want to apologize for my english, i am from Argentina.

I have been thinking a few things about who Red John really is.
First, the only suspect that RJ killed by himself is Partridge, Kirkland was murdered by Smith and McCallister does not have the fobia, so the list could reduce to 4 names.
If RJ really belongs to the Tyger Tyger org, why they killed Kirkland? Does not have much sense, that will help PJ deleting one other name of the list and making him closer to RJ really identity IF he is on the list. 
That leave us two options:

- RJ is not on the list, and he is someone else, my bet is Mashburn.

- RJ is Partridge and fakes his own death 

I'm just saying, it is another theory, and really sorry for my english!