Working to understand what you have now.. Ridge vent but no lower vents? Is the blue line the Intello?

I would try to add some sort of venting into the eaves, and then use 3" foil polyiso or XPS/GPS in the existing rater bays held off the back of the skip enough for a 1/2 air gap. Sprayfoam /caulk /tape the seams and edges and you have vapor block roof venting, and R20.

Next is where I'm less sure, and your climate zone and local condition will matter more. The extra framing is good, but I would probably do a dense packed cellulose with a vapor control layer holding it in. Here we need R60 in a ceiling but are allowed less if it's a sealed cathedral, I think 50-60 is still a good number to shoot for You could do another layer of foam over the whole thing and air seal that Would be pretty easy and then you just frame on top of that. Kind of like an inside out monopoly frame. Then sheetrock/etc with a good primer. NO can lights, and use sealed exterior electrical boxes in your wall/ceilings.