Hmmmm, this is something I didn't know the Miggy could do. What I want to know is this: if Jax gets that Lightwave screen running as a Mediator/TV window, is that screen going to be able to take input, or does the active screen still have to be the 15kHz one?
No, the active screen is the only screen on a multi-monitor setup that can take input. So, he'll still have to RAmiga-M to make the AGA screen active in order to actually be able to "touch" anything in the AGA box. Then, he'll have to RAmiga-M again to get his pointer back to the P96 screen, even though both will be visible at all times...
Could be a bit confusing until you get the hang of it.
Personally, I agree with Patrik, and I said it before. Just use a ModePro or NewMode program to forcibly push the Lightwave screen to 30khz and be done with it. Much easier, and much better picture quality. I'm just providing the 2 monitor info as it's an interesting idea for other things.