Re: lace dually + triple shots anyone?
The stock answer to your dissatisfaction with the P-Rails in the bridge/treble position is a magnet swap.
With the Lace Dually idea, the choice of model depends upon how distinctive you expect each of the permutations to be. I like the Red but a double red would be too much of the same thing. IMO, the dark Blue in the bridge position is slightly weedy whereas the Light Blue sounds almost Telecaster-ish. Red/Silver would be a nice compromise.