So as I'm apt to do, I overthink the simple things. I hooked all the hoses up, and it was a disaster because of the back pressure the flexible outlet hose caused. Any kink, and water went everywhere. Luckily I was alone, so no one saw it. Putting the most air possible at the pump outlet was my main goal, so I removed all the hose and and restarted this at the pump. I think that's all I'll need, and I'm not sure how I could add any more air than this to the water. I did float the inlet so it wouldn't pull silt up like it tends to do when it's laying on the bottom of the pond.
The riser is on the wye because of the small amount of back pressure in the outlet pipe. With my 3" pump, the water churned and rose 16" up the riser, so I left 10 more inches of head space, and all seems well. I hope I never need this, but if I do, it'll jut take a couple of minutes to set up.
