height difference. 2fort: you have the walkway ABOVE the courtyards, and the battlements above the bridge which spans a pond. Well: the middle point is raised. Granary: (not as much) ALL the points can be accessed from above
pretty much. though are you talking about a 5cp map?
So what your saying is that the second point should be either higher or lower than the mid?
Here is the best source for 5cp map design:
Jimmy is Studying 5CP Maps!
Some things to consider for yards:
-Are you funneling the attacking team through a chokepoint? Then offer flanking routes to prevent stalemates
-If you're not creating chokepoints, have lots of entrances for attackers to prevent stalemating.
Also, is your 5cp map linear (granary) or S-shaped (badlands)?
That is a big factor in how you want to use yards.