I would give the hets more time, but that's because I don't have the patience to deal with possible hets. Let's say you throw a woma at her and get multiple male womas poss het axanthic from the pairing. Do you have enough het females or axanthic females to prove them all out next year? It will take many years to prove out all of them if you just have the one breeding size het axanthic female. I'd stick with the known hets, then use a visual axanthic male to make your codom 100% hets.