The point is that any attack by Moridin will be extremely effective against Cadsuane since she relies so heavily on her artificial tools to shield herself.

Even your average AS would probably do better against Moridin specifically since without Ter'angreal they would atleast TRY to counter his attacks. Cadsuane would just rely on her ornaments and die when they failed to block TP.

I was just thinking that if Cadsuane is defeated or killed, who would be the one to do it. Her ter'angreal make it very likely that another OP channeler could not defeat her so it seems likely to me that if she is defeated it will either be by a physical attack or by Moridin and the TP. And after all the centuries she has been around I would expect her to know how to defend herself from physical attacks.