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Advanced Autoresolver

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*Compatible with SFO

Inspired by both other's posted observations of the AR's inability to keep artillery and monsters from spontaneously combusting, as well as my own experiences with the same, I set out to better understand the Autoresolver's system.
Months of testing and tweaking later, and having roped at least 2 other people into my madness, I feel like I have a decent handle on exactly what the AR system MIGHT be doing behind the curtain.
So, we are now releasing the mod we've been playing with and working on.

You can find a full accounting of the implemented changes the mod has below, but the tl;dr version is that your lords and heros should have more representative results in battle, and get killed and injured less frequently. Your artillery should perform better and die less often, and the casualties your army takes should be better distributed and be more likely to damage lesser units while saving your elites for the future.

• Combat Potential / CP: This stat seems to be used by the AR to determine the overal balance of power, which units target which units, and which units it 'protects' from injury by moving kills/damage from that unit to other 'surrounding' units and removing the injured unit from combat. Base CP values are set in the land_units table, but modifiers to this are applied using 'ai_usage_groups' defined in the main_units table. Overall, it's a pretty blunt instrument that is hard to make specific unit-to-unit changes with, without drastic modifications to the data.
  
• Kills Per Second / KPS: KPS is a stat we've assumed to stand for 'kills per second' and seems to map directly to the damage output the AR assumes for a give unit. There are modifiers that can be applied based on some VERY basic unit_class keys, as well as matchups between different unit_class keys. Again, this is very hard to target changes at specific units, or even at unit types more specific than "melee infantry" without substantial changes to the tables containing base unit stats.

• It seems like the AR initially breaks units into 'groups' via the ai_usage_group key and the autoresolver_battle_result_battle_complexity_max_units_for_scale value (default 10)
  
• Once it has these groups it matches them up against each other in fairly basic ways. From front-to-back each force seems to comprise of:
  • Melee frontline
    
  • Ranged units
    
  • Artillery
• Units generally target the front of the enemy 'formation' until that group is dead before they move to the next group. I.E: Your ranged infantry will take little-to-no damage until your melee infantry are all wiped out.
  
• Special cases like cavalry, chariots, flankers, harassers, fliers, etc, seem to make targetting decisions separate of this lineup. Harassers and stalkers, especially, seem to target units in reverse order, starting with your artillery, unless there are enemy harasser/flankers to fight first. As such, a strong harasser/flanker/stalker/flier group in your army can (even with our changes) destroy an enemy's backline if they're not protected by their own.
  
• Once unit matchups have been generated, the AR determines a Kills Per Second value for each unit based on their target(s), and resolves a timestep (default 5) in seconds(?) worth of kills for each unit.
  
• IMPORTANT! Once kills have been generated, they aren't necessarily assigned to the unit they were actually created against. The AR seems to use the targets' modified CP value(s) to determine if they will take that damage, or if that unit will be pulled out of combat and the kills will be assigned to another unit. If a unit is 'pulled' it doesn't seem to contribute anything to the AR for the rest of the battle, but it may still be targetted later if there are no other units left to protect it.
  
• Effects like morale, balance of power, chasing down fleeing units, etc are all considered to some degree at this point.
  
• If the battle is not yet decided, the AR just loops until it is.

• Bugfixes
  • Fixed Doubled Missile Unit Modifier in Sieges by Changing one into a Melee Modifier that was Missing
• General Improvements
  • Increased Unit Complexity to Consider up to 100 Units (from 10)
    
  • Lowered Battle Timestep from 5 to 1 for More Granular Results
    
  • Removed Modifiers for Naval vs Non-Naval Units, as Naval Battles aren't REALLY a Thing
    
  • Increased Displayed AR Prediction Uncertainty, as AR is Always Somewhat RNG
• Protected High-Priority Units
  • Removed 'Ensured Unit Loss' Damage Multipler Bonus
    
  • Increased 'Ensured Unit Loss' Combat Potential Weighting
    
  • Lowered Unit Wipe-Out Damage Threshold from 20% to 10%
    
  • Added KPS Penalty Against Characters
    
  • Added KPS Penalty Against Artillery
    
  • Adjusted Combat Potential Modifiers Based on Units' Existing Base CP and Player Tendencies w.r.t. Protecting Units
• Adjusted Chariot Effectiveness vs Infantry
  • Added Melee KPS Bonus for Chariot vs Infantry[REMOVED]
    
  • Added Melee KPS Penalty to Infantry vs Chariots
• Adjusted Cavalry Effectiveness vs Infantry
  • Removed Melee KPS Bonus for Cavalry against all Targets [NEW]
    
  • Added Melee KPS Penalty to Infantry vs Cavalry [NEW]

Notes with explanations of each change here.