Lots of good ideas brought up here, and a couple I scratch my head at.
Statistically speaking, here is a breakdown of the 6 lineups that have posted a positive net points so far. The six have played a combined 42 minutes. Small sample size, but it is early in the season, and that's what you get (the most-used lineup this year has only 50 minutes to its name - the second most-used has 9).
In those 6 lineups, the players that appear most often are:
Ed Davis (5 times)
Alan Anderson (4 times)
Amir Johnson (4 times)
Demar DeRozan (2 times)
Kyle Lowry (2 times)
John Lucas (2 times)
Landry Fields (2 times)
Terrence Ross (2 times)
As well as Gray, Bargnani, McGuire and Valanciunas once each.
The top lineup was Anderson, Davis, Johnson, Lowry, DeRozan.
The top players in terms of overall simple +/- this year are Johnson, Ross, Davis, Lucas, Gray, Anderson and Lowry, in that order.
The top players for net ORTG-DRTG are:
And in WS/48:
Based on the above, Johnson, Davis and Lowry are shoe-ins. So, Bargs
and Val go to the bench. Jose stays there. On the wings, you have a strong case for DD and Anderson. Then on the bench you have Fields and Ross, who have both been part of good lineups but are not holding up individually.
So, Lowry, DD, Anderson, Davis, Johnson.
With a second unit of Jose, Ross, Fields, Bargs, and Val. That's my vote.