For the Jazz 'project' - and most other stuff, very little control usage really.
My 'to go' preference being middle toggle ( i.e both pickups on together on a Gibson or Gibson style guitar ) - and all guitar controls on full, with herbs and spices added or subtracted later. I.e. Monster 'Jazz ' and B.K.P. heavy celluloid if I want subtle / sweet attenuation to match Tape wound 'Swing' strings - or Cleartone cables and Dunlop '205'picks for the assertive Be-Bop round wound strings .
Having said that, this is not currently a gigging set up ; but I prefer to control tone, volume and dynamics from the hands / pick anyway. When last gigging with Strat and Tele, in the context of a 7 piece band, I still prefered to let the signal leave the guitar nice and 'spanky' - then out board clean boost for solos and crunchy 50's / 60's style Soul and R&B riffs - especially as our Bass player had an active / humbuckered Bass , which produced high quality wool . :)