A free mod for Mount & Blade II: Bannerlord, by ukie and MajikalExplosions.
Simulations Fix - Advanced Autoresolve is a mod that helps to fix the issue of the randomness of troops and defense calculation.
By removing much of the RNG from damage computation and introducing damage and defensive factors depending on Party Leaders Leadership and Tactics expertise, the mod seeks to improve fight simulations (both players Send soldiers and AI battles amongst each other). The mod also introduces tactics for each formation, which adds additional modifiers. (Modeled after CK2)
The mod divides the troops by formations and adds each party's soldiers to their own list of soldiers. The amount by which the attackers' damage and the defenders' defense are altered depends on a number of factors.
In the original version, a randomly chosen troop from each faction is chosen, and one troop assaults while the other defends. Damage is primarily determined by RNG, and the computation is extremely straightforward. The goal of this mod is to eliminate randomness.