I am currently doing this with three switches on my FC6:
Switch 1 = Toggle Scene 1 & 4
Switch 2 = Toggle Scene 2 & 4
Switch 3 = Toggle Scene 3 & 4
Scene 1 = Clean
Scene 2 = Clean with an effect of choice (or any variation you are looking for)
Scene 3 = Crunch
Scene 4 = Lead
Same idea: instant access to Scenes 1-3 by just pushing its switch, and instant access to Scene 4 by pushing the active Switch (or as Admin said: turning it OFF). Then you can return to any of the first 3 Scenes from the Lead by simply pressing the corresponding Switch (1-3). Works great with minimal "cognitive load".
Switch 1 = Toggle Scene 1 & 4
Switch 2 = Toggle Scene 2 & 4
Switch 3 = Toggle Scene 3 & 4
Scene 1 = Clean
Scene 2 = Clean with an effect of choice (or any variation you are looking for)
Scene 3 = Crunch
Scene 4 = Lead
Same idea: instant access to Scenes 1-3 by just pushing its switch, and instant access to Scene 4 by pushing the active Switch (or as Admin said: turning it OFF). Then you can return to any of the first 3 Scenes from the Lead by simply pressing the corresponding Switch (1-3). Works great with minimal "cognitive load".