At this point, there are 16 games left. Our expected starters from last season (Smart, Brown, Tatum, Horford, RWill) have only played together in 10 games for a total of 81 minutes. Now RWill is out again. I think we need to figure out what the core rotation is going to be and start playing them regularly. If we don't get some continuity in these rotations between now and the end of the season, nothing else is going to matter.
I feel we are about at the point where we need to concede that RWill is not going to be available to play a set regular rotation. Accept that and figure out what you want for a first unit and start playing that unit together as much as you can. Not play people into the ground of course but start treating the rest of the season with more urgency (not less).
I am not sure if that means going back to the small unit with White or if you start someone like Kornet or Griffin, just to preserve roles. Someone though is going to have to pick up some minutes to make up for RWill. I think him coming in and out of the starting unit causes discontinuity. If he is used off the bench, and his availability is irregular, the impact is less.
I like Grant off the bench and it is not even clear that he is healthy enough for that role, so I don't want to start him. I would probably elevate Griffin to a starter. Still keep his minutes down to maybe 15 or so but use him in a defined role so that everyone else can have a defined role around that. Keep White and Brogdon as bench guys playing starter minutes.
I know that Horford and Griffin have not played much together (6 gms, 47 min, -7) but I am not sure why they couldn't.