77, Axcc, QJcc, KT, KhAd, 8Jo.
I call turn because he might have somthing stupid, but I think it's weighted heavily towards strong flushes. The times he has a set or two pair you need to make at least $1.2-ish on the river, and I wouldn't bet much more. Maybe 1.8-2.6 depending how stationary you think he is.