This would be "educated speculation"
Perpetual Burn development did not begin until after I'd left the company. So I am not speaking as a former employee confirming the spec, nor have I taken one apart as a consumer for measurement. Based on what I know about wire and bobbin size, you can not fit that amount of 42 regardless of the insulation thickness. I believe it's 43, like an underwound Custom coil, or overwound Demon coil. You can see in photos that it's not Plain Enamel. It has the color of a Poly wire. Some photos make it appear more reddish which can mean thicker build coating, but you can order the red tint or clear in single build or heavy build.
Point is, assuming the Perpetual Burn is not a hybrid (which has never been discussed as far as I know) you'd be getting a ~6k 43AWG Poly coil up against the fretboard and a good PAF coil (PAF's are 42 Plain Enamel for those that don't know) in the slug position. It's pretty much THE taylor made 59/C hybrid neck recipe, if you were looking for similar deltas.
The A2 recommendation is simply an opinion. You guys can do what you want. But I think it'll be the right mix for the neck to balance with the bridge. There's no rule that says neck/bridge sets have to both be A5 or both A2.
The "Burning Gates" would excel in both 24 and 22 fret guitars. You guys would probably love it.