I think this looks more like a new LTT and Demandred since they were allies at first, but when Taim wanted only power and saw that Rand is - and will always be - a little stronger with the Power (and therefore better than him) he turned on him just as Demandred did on LTT...

Taim may not be Demandred...But maybe he is in his head the way ltt is in rands

What on earth gave you that idea? Demandred is not dead, and as far as we know, Taim is not insane.

i think rizzo hit the nail on the head, its a classic power struggle and taim will do about anything to make sure he wins. Whether or not he is a dark friend (*shakes the magic 8 ball* and gets "all signs point to yes) will be played out, i am pretty sure he is, or he is working indirectly for them because of his wanting to be better than Rand in any way. Either way, i dont think he is going to "ride his white horse to the recue" as someone stated before.