None of the three lines are compatible. TSK, VPI, and Joliff...to get axanthics from hets they must be from the same line.
If you bred a het VPI to a het TSK you'd get possible DH for both lines.
Here's a SK Axanthic, it's a more uncommonly kept line, I think they're sort of cool:
http://ballpython.com/kingsnake/axanthic.jpg
A snow has been hatched using the TSK line, picture here:
http://ballpython.com/kingsnake/sksnowball_lg.jpg
Any other questions?