For this game friendly or not I would start with a strong line up and look to go for as big a win as possible in order to give the teams confidence a boost with the league cup kicking off in 8 days. No point in going 2 or 3 up then switching off in my opinion.

Experimenting with the line up shape is also an option as there is nothing at stake, particularly a line up with 2 up front and I would go 4132 with the line up:

Shankland Clark
Robson C.Smith McMullan
Butcher
Sporle Reynolds Connolly L.Smith
Seigrist.

There alternative tweaks such as Sow for Clark or Harkes for Butcher that can be made for example.

I am struggling to think of who else to put at left midfield/wing at the moment so Robson for now as he played there if I recall correctly towards the seasons end. Ideally a far better and permanent option is signed this summer.

Some of the younger player such as Mochrie, Glass or Banks can get 15-20 minutes off the bench although they can get more time against Dumbarton along with those starting on the bench or not involved at all.