Lol, common guys. Its like you never played this mod but just read it in a book.
Cavs only danger is dudes with crossbows cause few good shots with an arbalest can take any horse down. Pikeman are only alive at start of every round, during that time those cavalryguys who arent suicidal will just go around backstabbing everybody else who isnt near a pikeman. Eventually in the middle of a fight the pikemen either get massacred or have to drop their pikes, by that time the asshole cav gets braver and starts murdering more. You could say use tactics, but you cant guard a dude forever, babysitting is not fun.
And how does cav have - - - defence while archer has +++? Archers are made of glass, even throwing stones at them works. Cav are heavy armored and those with a plated chargers can run over entire organised groups of teams while taking minimum damage themselves. That sketch up there is totally wrong.
