[Kevin Leonard]

The difference between a stack of six and a stack of five is only 6 points, and if the stack of six contains no litter, there is no difference in point value at all.

3 stacks of 5 with 2 containers and litter: 36*2+5*2=82
2 stacks of 6 with container and litter: 42*2=84
Only a 2 point difference between the 2 strategies executed perfectly.
Now,
3 stacks of 5 with 2 containers and litter at 97%: 82*.97= 79.5
2 stacks of 6 with containers and litter at 75%: 84*.75= 63

Therefore the more consistent stacks of 5 are generally the better option.

However, the number of containers your alliance is able to utilize can also factor in to what height you should be building stacks at. If your alliance only has the three containers available to use, stacks of 6 better utilize your containers than stacks of 5. But not much better in the long run if the 6 stacks is less consistent.