I use a 2-bottom moldboard plow w/ my TC35 hydro.. I have red clay & rocks. I plow deep.. to turn under all the old crops residue, weeds, and cow manure I've spread.
If I'm prepping for a fine seedbed/covercrop.. I then hit w/ the disc's.. and then skim it w/ the tiller if needed. I use a 72 inch NH 105A.