Well, I will spearwall on, defend on. Wait for them to charge in. Wait for a few secs more then turn off defend and my pikes will push them back.

If ur pikes are changing to swords, i will turn everything off for a few secs then turn everything on again. they will bring out their pikes again.

imo, pikes needs to be 2 units deep to be effective because the 1st unit will usually be decimated but they will be dealing the most damage. Then 2nd unit behind will not be dealing a lot of damage but they will be holding the line.
(i mean UNIT, not rank or men)

Believe it or not. When pikes are working well, they eat elephants for breakfast. I personally saw it happen.