Have you asked Accurate for their recommendations? It's probably the best place to start. If they have no tested recipes using these powders, you may be out of luck in your search.
Lyman's Shotshell Reloading Handbook, 5th edition, lists loads for neither No. 2 or No.5, altho they do have listings for 3 or 4 other Accurate powders.
The 4th edition lists several 12-ga loads with "No.2 Improved", but nothing for No. 5, and nothing with Accurate powders in 20 ga. I've got an older (early 90s?) abbreviated Accurate manual. While it lists lots of data for No.2 and No.5 with handgun cartridges, it only shows Solo 1250 for the 20 ga.