I don't think you can cant a bow AND use sights. I believe Nuge shoots bare bow when he cants it. If he is using a sighting system he's going to have to keep it vertical (unless you could invent some sort of angled bracket that mounts to the bow to allow for cant.)

I think that is also why his arow is nocked real high(compared to where he attaches his release) He sights right down the arrow. And with the flat shooting of todays compounds, I'm sure it is quite accurate without being as difficult as one would think.