Can be used offensively but mostly a defensive army.
Polish:
5 Lithuanian Archers (place 3 of them as a row in the front and the other 2 on the left and right sides facing outwards so you have a half square, each formation 2 rows deep, then deploy stakes)
4 Spearmen (deploy behind archers as stakes will take out cavalry. Spearmen are for anything left over after a charge through the stakes or if enemy circumvents half square of stakes)
4 Polish Nobles (Most important units if fighting Timurid elephants. Send Polish Nobles to throw javelins at any elephant artillery first then goad enemy army to your half square using your harrassing PN. Polish Nobles kill elephants the fastest out of anything in the game except for a close up ribault)
3 Artillery (Fire at will. In the middle of the half square!!! Trebuchets and catapults or cannons, serpentines later on)
3 Polish Guard or Polish Knights
1 General Unit (these 4 knight units split into 2 units on each side of the half square far back so Mongol cavalry charges stakes not your cavalry! After Polish Nobles run out of javelins and archers and artiellery run out of ammo i use 4 Polish Nobles and 4 Knight units to surround whatevers left and mop up. Or to help half square if spearmen cant hold it against enemy infantry or something)
ONLY WORKS FOR POLISH AS THEIR ARCHERS CAN DELPOY STAKES AND PLUS THEY HAVE THE ESSENTIAL MOUNTED JAVELIN THROWERS TO KILL ELEPHANTS QUICKLY.
If you go up against a lot of elephants i would recommend replacing the polish guard or polish knights with more polish nobles.