Re: Pot Value for Single/Humbucker Combination?
It really depends on how bright your pickups and guitar are and what tone you want. I like my H/S/S frankenstrat with a 250k pot for volume and 500k for tone, but others prefer using 300k or 500k for the volume too (which is "standard" for humbuckers).
Part of the answer also depends on whether or not you have a "treble bleed" on the volume pot. That retains the high end as you roll down the volume and makes a lower value volume pot more workable. (Please do a search here and in the "Vault" for "treble bleed" 'coz there are too many options and opinions...)
Sorry there's no definite answer,
Chip