Thanks Ibby. I'm all about happy endings. Regardless of the body count to get there.
When I was reading Planetary, I read that there was an ongoing discussion about light and invisibility. As a result, Ellis' rather dull Invisible Girl rip off wore special goggles to enable her to see, while light bent around her.
If she was intangible everything, including light and oxygen, would just pass through, the goggles falling to the ground.
Fortunately, all such characters are saved by the comics code. This prevents them from having to run around naked in their intangibility. This special Code Bubble also enables them to breathe, see hear and speak etc.
So, in your example, in order to participate in the story Dayton would have to sense his targets. Thanks to the Code Bubble he's using sight. This makes him vulnerable to QQ. Not that he would use it, as he was pretty unhinged to be thinking so tactically.