I felt this forum was getting too centered of late on what things don't work in the game as opposed to how things work in the game. I want to test my idea against a unit of roman legionarres with their short gladii. Against hoplites, my macedonian phalanx killed half of them with 0 casualties. I paused the game and saw how all of my pikes were gouging the greeks while they were stabbing at air. If I get the similar results, you definitely don't want to use roman infantry to hold a phalanx for a cav charge.