which lines are compatible with VPI?

maybe the way to go would be to get good examples of VPI, SK and Joliff and MJ and then just breed them and pick the best of the best babies as holdbacks. of course that only works if they are compatible.

basically the good old line-breeding game: select excellent examples to start out with, breed, produce a lot, hold back the best you get, and so on. with hypo, people mix regular/unbranded hypo with named lines all the time, and it has advanced to a degree that you can asks for a specific line if it will be compatible with regular hypo. and the question makes sense and you get an answer.

how is it with axanthic? are there mixed axanthics, with different lines in them, or something you could call regular axanthic?