If going with SMB and CC, I don't think there is any large overlap between the 2. SMB have an extremely diverse diet and do well in a pond with 12-14" visibility and will thrive on many things growing in the pond.
CC and SMB could do well together if the CC are not too numerous-not because of competition but because of their ability in numbers to churn the water up.
Catch 22 stocking craws here.. CC will smack some but to have some remain for smb you need some rock riprap, rockpiles and probably some brush piles. Getting vegetation established with craws is tough to do so I would probably start minnows the first year with an attempt at starting some beneficial vegetation during that first year also.
15-20 CC per acre and 60-70 SMB per acre after a full summer of minnow reproduction and I too, would likely go even lower on the CC.
After 1 year with SMB I would add 4-5lbs of craws per acre ..
You can grow HEAVY SMB if you manage for that.