well yeah that CAN be a good starting point. Axanthic super pastels are cool! But... keep in mind that when you breed an pastel het. axanthic to a pastel het. axanthic you only 2/16 (1/8) pastel Axanthic and a 1/16 Super pastel Axanthic. + the fact you'll get some babies that are het and some are not, you wont be able to tell the difference so those will all be 66% possible het axanthic.

concidering that it might be a better idea to get an Pastel het. Axanthic female and a Pastel Axanthic male.