Not trying to complicate the issue, but keep in mind as you change jet sizes on a pump speed system, you change the flow curve. The smaller the jet run the more it resembles a single stage system. The pump ramps up speed behind the small jet orifice and makes near max pressure very early. While spraying less overall, the flow curve is very flat.

We routinely see 1 AFR drop running 100% methanol and about a 25% injectant ratio. If using the w/m for cooling add jetting until you reach the desired temp then start to tune the maps for the added fueling.