Pandya will not bowl in the test series most likely until his new remodelled action is ready. I don't mind him playing in white ball cricket as I think once he comes back with the ball he could be a very useful sixth bowling option like Stokes. What he does need to do is get his batting up there and make that number five/six spot his own.
I don't want him in the whites even if he bowls though, feel like a combination of Jadeja and Ashwin at seven and eight would serve us better if we need that extra bowler. Two spinners is risky indeed but neither have been taken to the cleaners like other overseas spinners on Australian soil and I feel Ashwin works better whenever he has Jadeja supporting him from the other end.
Siraj's bowling today showed exactly why he is highly rated as a first-class bowler. When he is forced to deviate from his standard bowling he gets hit everywhere but that will not be an issue in test cricket. My first choice pace lineup would have a debut for Saini if his body can handle the rigours of test cricket, Shami and Bumrah. We need another pace all-rounder indeed but I don't really see any upcoming talents at the moment.
I don't see us winning the upcoming series though. Australia are heavily fired up for revenge and they have three batsmen now who can bat for days if needed. We might miss Kohli too in addition and I'm not sure if someone like Shreyas or Gill can come in and make an impact in his absence. A 2-1 in Aussie favour sounds like a half decent and realistic result for us, anything more and I would be surprised.