DomA was partly wrong there. We had a PoV from Sammael in LoC where he talks about there being two kinds of compulsions. A subtle one that carefully manipulates a person through psychology (this is the type Ishy would have used on Hawking), and one that works like a hammer and totally destroys the mind of the victim (Graendals pets and the boy Nynaeve found). So its something RJ thought up quite a while back, and not something Sanderson invented.

So basically, both types of compulsions have always existed. Furthermore, the fact that Sammael is aware enough of compulsion to know this suggests that he too is capable of the more subtle kinds of compulsions.

Furthermore, as I have mentioned in other messages, Aran'gar herself demonstrated the subtle kind of compulsion when she placed compulsion on Ramshalan without totally destroying his mind.

Thats Ishy, Graendal, possibly Sammael and quite likely Aran'gar, that are capable of the subtle compulsion. It also occurs to me that in order to remove compulsion, you have to be capable of weaving a "mirror" weave of the compulsion weave. That would suggest that since Semirhage was capable of removing the compulsion on Elza (and in her thoughts showed familiarity with it), we can probably add her to the list of people capable of such compulsion. Oh, and Moghedien did teach compulsion when captured, and mentioned the subtle forms so thats another forsaken who knows it.

Bottom line is that it seems most of the forsaken were capable of compulsion, and most (if not all) of thise were also capable of the subtle form of it.

Someone should ask BS about this.