If you go with the het lav, you can't breed anyone else to the girl. You need to know that every egg was fathered by the het lav. So if he isn't ready now, I would make supers and try for next year like Alice suggested.
Despite being a great fan and collector of ball pythons with recessive genes then I would recommend super pastels. They work the same way like a recessive - all of the offspring in your case would be pastels.
And then you could invest some money in an axanthic and create some pastel het axanthic - that's great at least in my world.
I'd do pastel x pastel and hold back any super pastels that you get. Then sell off all remaining pastels and normals and start raising a bit of funds to get yourself another het lav. Aim for one a year older than the current year. Cuts down on the wait time for breeding. Then breed any super pastel you have to any lavs you get and make a bunch of pastel het lavs. Then breed those and aim for super pastel lavs. Done and done.
--Stephan.
"I have no fear of losing my life - if I have to save a
koala or a crocodile or a kangaroo or a snake, mate,
I will save it." --Steve Irwin (1962-2006, RIP).