Also, it is too far away from the action for a man like Demandred. What you describe is smart (assuming Demandred even knows the first thing about the altered world geography), but not in any way realistic to one of the Forsaken. They need to be seen and seen to wield power, even Moghedien needed to boast of her actions at every opportunity, It is how they measure their own success. Demandred couldn't stop talking about how amazing his achievements will be at every meeting. That and consistently threatening the others so they wouldn't think him weak. And why would he be wearing the latest fashions of the Age if he's hanging out teaching on an island?

If any of the Forsaken were willing to do this the battle would have been over before it started. Think of how Verin described them. Selfish. Not to mention the egos involved. Demandred sitting on a dessert island somewhere training a bunch of "children" to Channel for the good of the Shadow is laughable. Not while the other Forsaken were moving about and carving off fiefdoms. Not without direct orders from the DO or SH.

As a portion of his plan I can see him gathering a small core group and teaching them to a small degree, enough to enhance his armies, but as with all the FS he will be jealous of his knowledge. The thought of him training hundreds of master OP warriors seems both redundant and out of character. More likely he will recruit from the BA and Dark Asah'man, DF Sul'dam etc... to fight in his armies.

I can't see RJ having a new Channeler system start without giving us a few tidbits either, he loved to give us snippets of this type of stuff. And why would Bsand keep telling us the Demandred story will be epic if all we end up getting is another group of Channelers? I'd like to think Demandred is doing something new, not just being an imitation Taim. In the new prologue Moridin heaps praise on Taim for training new Dreadlords and says it was something none of the others had done.