It's a somewhat difficult point, as it depends mostly on your tastes and gear, PU sound is highly interactive with the pots, treble bleed,cable, impedance of the first pedal or amp.
Using a resistor in // has two effects : gives a "maximum" efficiency to the treble bleed cap, and soften a little the curve of the volume pot.
I prefer to choose the resistor first, between 100% and 50% of the pot's resistance, i like this curve, then i choose the cap.
If you use a higher resistor, you will make the treble bleed "more efficient" actually, ie giving more highs, and subjectively when setting the volume pot low, less lows.
I use this trick to have an added control on the lows (similar to Reverend guitars low-cut)
On the schematic the resistor is 25% of the pot, but i used a higher one later (470K)