Thorns, I think this may be a bit too simple for what you're after but has good results: level stakes win only BEST TOTE/SP or if country best of NSW/Supertab (Sportsbet)
(1) 100 rating (unitab)
(2) last start winner within 21 days.
(3) Pre-post fav (WA TAB-Form (available free on -line) may work with other publications but dont know.

thats it