The best results I had with APHS was developing with W2D2.
Originally Posted by Aggie
First I made a interpositive on FP4 developed in HC110 and then enlarged onto APHS. Stuart Melvin of Santa Fe told me that there were potetially some problems with APHS depending on the source of manufacture of the film, specifically APHS made in the US had defects while the Japanese source film was okay.
I'm not sure if this is still true now but it may be soemthing to consider if you order from Arista. That is to ask for Japanese manufactured APHS.
Using Dektol with Ortho film is an old trick which can work quite well once you dial in the dilution and development times which isn't too hard.