Last I played There was an issue were player owned and allied troops only had half the engagement range. Closest fix I had was using the "my little warband" mod and custom building riflemen with points only allocated to athletics, crossbow and pole-arm. At T4-5 they had an effective hit range at 225 with a crossbow skill around 250.

The problem is large allied battles was only having around 6 men out of the formations 180-250. So not enough to make a difference, leading to excessive losses. Cavalry on both side completely annihilated in the first 5 minutes. Also never helped that the cannons were pointed the wrong way.

thank you ill do my little warband

Doesn't always work, But having an 80% hit rate will make short work of an enemy formation. Would recommend Jazails and Jaeger rifles with bayonet melee weapon. Also make sure the Skill cap is turned off. One of the more annoying aspects of bannerlord is having skill on troops they don't use. And do keep in mind that even if your allies are using your variants they will still attempt to march with in 25 meters, Even if they can accurately hit at 185-210.

can you still use cannons with my little warband?