So would it work if you do WR B NH if they stay on the ground into a 1aB or 2A+B? That would seem like a nasty setup.
Yes that would work. But keep in mind that a normal or back tech will make the throw attempt whiff.
Near the edge/wall its use is safer and more rewarding. Especially if they stand up teching left expecting A+G for a RO attempt you'll get your RO via B+G sidethrow.
On characters with bigger hitboxes 2A+B and 1aB after WS B become a techtrap for everything but left btw. so it's worth throwing this in sometimes imo.