i wouldnt really want that setup, but that aside, i have a few ideas. 10 way freeway switch would give a lot of options, other controls would depend on how it was wired. another thought would be a normal 5 way for the strat pups, master volume, p/p master tone, then a blend for the second neck pup. id wire the p/p to bypass the blend pot and put the second neck pup in series with one of the other pups