knowing that I'll be playing this level again
given how much crafting is required on HEH (thus making it a painful level), you might be able to just not play it?
if you can do 3 smaller 1500 AP levels in the same time as it takes you to do HEH, that would be a better option imo.
RE Techs vs AP:
Go AP, AP is something you always need, while techs are only a problem on a few levels (all except EH can be skipped with Skip Level advancement)