Personally I think Pocock is head and shoulders above Hooper at 7.
I don't think Hooper could ever really play 6 or 8.
McCalman is a very good 8.
I would go for Poey at 7 and McCalman at 8 and would find it difficult to have Hooper in the 23 (dare I say it)
They would be better balance for the team.
Although the two of them on the field together somehow helped produce some of the Wallabies best results in years.