You would absolutely have to have more adults involved per student. My kid's HS has an average class size of 30 and some classes approaching 50 students. I can't imagine what a class of 35+ disruptors and only 1 instructor would look like but it wouldn't be pretty.

Ideally, something closer to the 5-1 ratio my district mandates for special ed classes would be more effective. These kids are going to need a lot of individualized attention if you want to help turn them around.