I think the rest of this year will be Gentry's time to experiment with who the best two other players are to put next to Fox, Barnes, and Sabonis
I think it's likely he goes with the same starting five of Fox/Holiday/Barnes/Metu/Sabonis for the next game, but I'm sure we'll see DiVincenzo start at SG and Barnes moved from SF to PF as Gentry tries playing Holiday, Harkless, Metu, Lyles, and maybe even Jackson along with HB.
Given the lack of PG depth I think it's unlikely the Kings start Mitchell and Fox unless they get desperate. He'll still get plenty of minutes though, and I'm sure they'll play together a fair amount.
I think DDV is viewed as a long term piece if they can re-sign him. Lyles has a very team friendly option for next year. Holmes needs to be showcased for a potential trade this offseason. Mitchell was a McNair pick and is under team control for several years. In a normal situation without an interim coach, Lamb and Jackson would likely be the guys that get buried on the bench just because they're unlikely to return next season. But with Gentry not only trying to win to show he's the longterm guy for the Kings, but also trying to earn his next job if he's not retained in Sacramento, he'll probably play whoever he thinks will help him win now.
So the starting five and minutes distribution is going to be fascinating to watch IMO.