I always fill out all 4 spots. Typically, I will have 5 low posts players and 7 perimeter players on my roster. So if I have 11 available with 6 perimeter and 5 low posts guys, usually I'll use one of my low post players at the 3rd string SF and fill out the rest of the depth chart as I normally would. If I have 7 perimeter and 4 low post players, I'll use my best non-starting rebounding perimeter player in the 3rd or 4th slot at C & PF depending on his Ath value.