Playing Sullinger and Olynyk together off the bench probably makes the most sense. Maximize their offensive skills when their defensive ineptitude will be the least damaging.
Jerebko and Zeller will see use depending on matchups. Those two together might be a better bench combo than Sullinger and Olynyk.
Somebody out of that 6 man grouping is going to see a lot of time on the bench.
You know, last season Kelly Olynyk averaged 1.6 steals per game, averaged 1 block per game AND had a postiive Defensive RPM that ranked him top 35% of all centers.
In fact even his rim protection stats weren't as bad as I had expected if you go off this list:
http://nyloncalculus.com/stats/rim-protection/The numbers ranged from about 55 for the worst player to 670 for the best, so Olynyk's PS - Points Saved - stat of 227.6 is a tad below average.
He ranked about on par with the likes of Chris Bosh, Kendrick Perkins, Bismack Biyombo, Kenneth Faried and Taj Gibson.
Our best ranked player is Tyler Zeller, who ranked 20th best, just above Horford, Cousins and Draymond Green. Not bad.