I know that the writers said that the Fire and Brimstone episode showed a "darker" side to Jane but to me, it was out of character for Jane.  So many times during the series Jane has been planning or thinking something different to what it appears.  The reason it seems out of character is because did Jane REALLY expect Red John to walk into his trap?  Red John is always one step ahead and I think Jane knows this.  Therefore, Jane, knowing that Red John would see it as a trap wouldn't show up but in some way he knows this will flush out the real Red John.  This is why I favor Partridge as coming back from the dead.  

Does anybody really think the Bertrum, Smith or McCallister is Red John.  Those guys are too bumbling and slow.  Red John is calculated, smooth and precise.  I've wondered if Red John would even turn out to NOT even be someone on the list.  But if that were true it would not be fair on viewers who have been following the story line of this list for a long time.  Which again makes me favor the Partidge theory that others on this site have suggested.  They could easily make the Partidge character turn from what we know him as, that is, an immature childish person to then turning to his real self to show he's been putting on a good act for a long time.

Either way, I think the Red John and Patrick Jane showdown will actually turn out being on Red Johns terms.  Maybe RJ will kidnap Jane or something.  Obviously Jane will triumph in the end.  Overall, it seems a little obvious to me where the writers are trying to take us right now.  Away from whats really going on, to get our eyes off the real RJ and I think Jane has truly known who the real RJ is and is concocting a plan to flush him while letting RJ think that he's winning.

If it really is someone on that list, I would go with Partridge.  I think we'll see him in a different light once he is revealed.