Has played together twice - but nit sure they had their regular rotation as Gobert was out. Those games were Indiana and Detroit (both were terrible losses).
D hasn’t been in the floor together at all this month with either Whiteside, Ingles or Mitchell being absent.
Jazz need to get healthy. And then, definitely seek ways to improve the C and D lineups.
That said, the success of lineup B is that they are playing the other teams second unit at the beginning of the 2nd and 4th quarters while the starters take a rest. So I don’t expect Lineups C and D to do a lot other than try to keep things even.