I use 2:2:100 for about 6 min, or 1.5:1.5:100 for 8 or 9 min depending on the subject.
I tend toward "punchy" negatives, a lot of folks use 1:1:100 for something like 10 or 12 min, near as I remember

I shoot this film at 200. All sheet film. dunno about roll.