Dog food fly - brown chenille wrapped in a spiral in a size 14 tiemco 2488 hook. You can a little tungsten bead as the middle if you want the really big ones that rarely surface or film feed
Go fish it at night with a mysis shrimp pattern and a head lamp. Those toads that sat there all day like a bump on a log are gorging on mysis that are up in the water column in Taylor Reservoir (because they're nocturnal) and getting sucked through the dam. It's freaking Disney Land, if the water levels are low. 4 of us have caught a combined 100+ fish in 2.5-3 hours. Of course, some of these guys are pros, so that helps.
As for your fly choice, I get ripped for fishing a pegged egg. Might as well be baitfishing with your fly selection
Oh, try some tungsten JP's Nymphing Mud in a brown color. It'll look like a pebble versus a split shot. I fished a lot of pressured fish around Denver when I "did time" there. Very technical fishing but it made me a better fisherman. Little stuff like this adds up on big fish.
PM me if you are out here sometime, we might be able to connect. I'm elk hunting tomorrow but if you want, we can catch the game at Bar 47 in Almont after my morning hunt!