Its a wade fishermans world on the Rio right now. Nymphing is, unfortunately, most productive, but watch for hatches of BWOs.
Streamers will also fish really well right now.
Nymphs: Prince nymphs 10-16, Runt Stone Golden 12-16, Flashback Pheasant Tail 14-18, Duracell Jig 12-16.
Dries: Morrish Hopper, Chubbies and Stimis in 12-14, Para Adams 16-22.
Olive Splitsville Emerger 18-20, BWO Para Extended Body Dun 18-20
Streamers: Olive Bugger 6-10, Olive Sculpzilla, Sculpin Snack, Complex Twist Bugger.