Agree on the 1 pickup P90, still you have to consider if it will work well with the effects you use, some P90's dont work very well with effects at stage volume, or at least i think so. I am really sceptic about how a P90 will react to the TT gain aswell.
I only have an old semi with dogear, and obviously i dont want any effects on that and i also would not consider playing it on stage.
You pretty much would need one helluva top notch P90 IMVHO.