I have used Agfa 8 quite successfully with Kodak TMY and Efke 100. I have not tried it yet with APX 25 or Efke 25 but expect it will work well.
With Efke 100, I developed for 8 minutes at 68F with undiluted Agfa 8, using minimum agitation (2 slow torus inversions per minute). Results were very sharp with excellent mid tones. As a starting point for APX 25 I would use the same time/temperature/agitation.
AGFA 8
Warm Water (125F or 52C)-------------750.ml
Sodium Sulfite, dessicated--------------12.5 grams
Glycin-----------------------------------2.0 grams
Potassium Carbonate--------------------25.0 grams
Cold water to make---------------------1 liter