I love them.
Neck, A4, polished, low wind for that piano clean and stinging leads, especially with a .015mf cap wired 50's style rolled back, ala "Woman" tone.
Bridge? 10-12K with A5. Phat Cats do really well with mag swaps, though they are a bit too overwound in the neck for my preference. Switching to 10's helped, but I like wound strings to punch hard without bass flub in this position.
Lynn Burke over at Blues City Music has some Fat Tone retro-90's that are KIIIIIILLLLLLLLER you can get for a song, like $30-$40 if you want to try some HB sized P90's. Can't recommend them enough.