I have a plasma with 6 steppers as well
It's working great with qtplasmac, 7i96s, 2thcads one for the one for ohmic, parallel port breakout for the other steppers board running on a ryzen 1600
Couldn't recommend it enough. Use 2.9.2 if you want the rotary to work 2.10 wasn't working with the sheetcam post as of a few months ago.