Yeah, shit's pretty hard. It's not so much links as they are late cancels(as in, Slayer can cancel the recovery frames of certain normals into others on block/hit), but it's mainly the reason why I don't play Slayer(or any other fighting game with no gatlings à la street fighter). I can sort of help you how to do them though.
If you think we're free in Guilty Gear, you better practice, because I got back into the game pretty hardcore since the last time we played, and I've been training the whole BlazBlue community at it. They're still pretty free though, but it's a start. Brice and his backdash Potemkin might make you rage though.