Australia need to stop picking primarily top order players for middle order roles, it just causes confusion in their camp and put players in batting positions which they're not accustomed to. I didn't see the point of promoting Marsh to 3 in the WI series, instead Aus should have given him a chance to make 5/6 his own position, and let Henriques or Phillippe a chance at 3. It looks like they'll need Smith at 3 which their collapses and a stable hand to guide them through their innings on the slower UAE tracks. I see absolutely no point in Phillipe given a "middle order role" when you know he's not accustomed to batting down the order. At best, he should be a back-up to Warner and Finch at the top.
An interesting ploy would be to have Wade at 3 to play the role Moeen Ali played at CSK by scoring at a fast rate in the middle overs and play Smith at 4 to control the innings. I'd rather go for a batting order of:
Warner
Finch
Wade
Smith
Maxwell
Marsh/Stoinis
Cummins
Agar
Zampa
Starc
Hazlewood
If Smith isn't gonna play the WT20, then bring up everyone below him up one position, play either Christian and Sams and drop either Starc or Hazlewood for Swepson if it's a turner.