I think I would try like
SAS TT, Nesmith, 1st
BOS D Murray
Then resign E Fournier
Then you'd have a rotation like
D Murray, M Smart, PP
J Brown, Fournier, Smart, R Langford
Tatum, J Brown, Fournier
A Hortford, Tatum, G Williams
R Williams, A Hortford, M Brown
Shown another way:
PG D Murray(30),M Smart(

, PP(10)
SG J Brown(9), Fournier(16), M Smart(20), R Langford(3)
SF J Tatum(13), J Brown(21), E Fournier(14),
PF A Hortford(20),J Tatum(17), G Williams(7), R Williams(4)
C R Williams(24), A Hortford(

, M Brown(12), G Williams(4)
That gives DM (30), Tatum(30) JB(30), EF(30), AH(28), MS (28), RW(28), M Brown(12),GW(11), PP(10), RL(3)
Fournier becomes your 6th man, 1st guy off bench, with Smart, M Brown, PP, and Gwill. Maybe RL improves and can take some of GW's minutes, but that makes them smaller.