FWIW, at the moment I’m doing:
Cultivate
Roll
Seed
Fertilise
Weed
Fertilise
Harvest
Mulch
But that’s not really driven by testing.
With stones turned off and a moderately wide cultivator, disc harrows didn’t seem worth the weed penalty. Ploughs you only need occasionally (and not at all after the initial ploughing if you have it turned off), except for certain crops like corn and I think beets, which you have to do after every harvest.