There's some flexibility there.
Ak can play the 3 and 4; CJ can play the 2 and 3. Here's how I see bith scenarios (Okur out, Okur back).
With Okur:
C - Jefferson (28), Okur (25), Fes (5)
PF - Millsap (33), Jefferson (15)
SF - AK (33), Hayward (15)
SG - CJ (30), Bell (18)
PG - Deron (38), Price/Gaines (10)
Without Okur:
C - Jefferson (35), Fesenko (13)
PF - Millsap (35), AK (13)
SF - AK (20), CJ (13), Hayward (15)
SG - CJ (20), Bell (28)
PG - Deron (38), Price/Gaines (10)
Without Okur, just bump the rest of the starters up a few minutes, and count on Fes and Raja to get more time. Having guys like Jefferson, AK and CJ who can play multiple positions really helps. All three have the size defensively to match up against their oppenents (especially since they would be playing opposing subs at their secondary positions). What I really hope is Honzward becomes an eventual starter, with CJ becoming the backup at the 2/3. I'm also hoping AK can be traded for a top-tier SG or SF at the deadline. Or who knows, maybe an emphasis on defense and "nastiness' brings back the competitve fire in AK. Could AK average, say 12/6/3/2/2? That's all we'd need from him.