Yea, PC told me about how Rice always does it and how it's really beast. Training yourself to do it is a decent idea, but it gets ***** at low %s vs. good crouch cancelers, so I'd still advocate stationary tech -> forward B as your default reaction.Quoting myself because I want an answer.
So I'm not sure how much ppl know about this, but someone mentioning walljumping reminded me of this. Tomacawk and iamthemicrowave were doing this recovery trick. Whenever they ledgeteched, they would point up getting the auto walljump of course, and also hitting the cstick towards the stage, making an instant walljump attack and bairing the attacker. It really isn't too difficult if you can remember to do it...Maybe everyone knows this.
As to your other question, I don't know what you're looking for. If you have an example of someone doing better things off a shine than you right in front of you, why don't you just do that? I mean, the only thing I can really tell you is that you shouldn't dair them above 40ish in the cookie cutter shine -> WD -> sh dair combos, because then they can tech and it's **** near impossible to follow up correctly. You're better off doing aerial shine -> platform wave land or a sexy WD reverse utilt or a JC usmash or sh uair or sh fair -> grab even.