With SBR 9 (EV 2 to 6) I would develop for about 65% of my normal time (i.e. dev time for scene of SBR 7) as long as the dev time is above 5 minutes.

The extra stop of Classic 200 is not enough to warrant choosing it over Efke PL100, a much nicer film with superior reciprocity characteristics. If you really needed more speed, Classic 400 is a better choice.