Depends. If you set up your song specific presets to match your setlist, I'd imagine youd have...
View 1
Button 1 Press (PRESET +1)
Button 1 HOLD (PRESET -1)
Button 2 (VIEW +1)
Button 3 (whatever you want maybe tap tempo/tuner)
View 2
Button 1 - 3 (SCENE Select 1-3)
View 3 and 4 - whatever you need....maybe list a few song specific presets incase you need to run a song during rehearsal
to me, the above sounds like a PIA if your band needs to change setlist song orders on the fly, or run a specific song in rehearsal that you'd then have to navigate to.... also for each gig, you'd have to re-order your presets to match the setlist again - not a lot of flexibility, and would create a lot of wasted time managing your preset order.
If you had an FC6 though, you could set it up differently
View 1
Button 1-3 (Scenes 1-3)
Buttons 4-9 (Song specific preset)
View 2
Buttons 1-3 (Scenes 1-3)
Buttons 4-9 (Song specific preset)
View 3 and 4 (repeat above - add a tap tempo/tuner in there somewhere)
Gives a lot of flexibility.
Just ideas - not how you have to do it.