I’d ditch the water at your power level. It’s not doing you any good and is taking up space. You will not be able to get enough fuel in the chamber when you’re spraying that much water. It also screws with the number your wideband will show.
I can ramp it in and PWM the amount delivered. It doesn’t have to be an all or nothing with the WM. I’m just looking at it as extra insurance when ambient temp is really high and IATs start to climb.