One interesting fact is that Bethamin and Seta know all the damane weaves, and a few weeks after beginning to channel, are capable enough at this to offer help to Mat in his battle, and the only opposition is from Joline, who insists that Novices should't do this kind of thing.

I think this indicates experienced sul'dam can quickly gain strength and skill, and may well be able to lead real links. Which may be a great substitute for the a'dam.

As for Caemlyn, I agree with a lot of what you say, but I'm not wholly sure an immediate rescue isn't on the cards. Too much of foreshadowing, and too many mythological parallels, suggest many of the main players will be fighting there. The BT is also due to be "rent in fire and blood". Merrilor may well be disrupted by this news, and there may be a simultaneous attack on Caemlyn and the BT.