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Better Chaos Cults

This mod is currently being reworked for update 5.2, as such I would not recommend using it right now.

I felt vanilla Chaos Cult mechanics were underwhelming, so I decided to improve them. Originally this was only targeted at cult buildings but, as I continued development, I came to the conclusion that I'd have to overhaul more than just the buildings. The mod improves cult buildings, allows cults to be purged (removed), and allows non-Slaaneshi cultists to establish cults, though they're much less effective at it.

At the time of writing, vanilla cults have a 25% chance of spawning in an AI region with greater than 75 corruption, per turn, with a 15 turn cooldown (vanilla mechanic). This mod improves that to a 30% chance, a 10 turn cooldown, and cults can spawn in player owned settlements. These numbers are configurable via MCT.

Most cult buildings now have a 5% chance (or greater) to expand the cult to a nearby region, as long as the adjacent region has a similar corruption value of 75 or greater. This felt like an organic and realistic way for cults to spread.

Khorne, Nurgle, and Tzeentch cultist agents can now establish cults after reaching level 5. Cults will be purged if the necessary corruption in the province reaches 0. Initially cultists will sacrifice themselves to establish a cult, after reaching level 10 they are able to establish cults without sacrificing themselves. This was my way of letting those factions spread cults in a targeted manner while also ensuring Slaanesh remains the master of spreading cults.

The mod buffs all cult buildings as outlined in the screenshots. I tried to make them a better thematic fit as well, but I'm open to suggestions. Here's my thought process for each dark god:

Most of Khorne's buildings revolve around anarchy and spreading it, so these felt really good to me.

Nurgle is a slow but inevitable power, as such his buildings ebb and flow with life itself and the populace. His cults are the most difficult to get rid of once the infection sets in.

Slaanesh cults tend to benefit to the host faction by lavishing them with excess, with the intent to vassalize them later. Slaanesh cults also only passively expand to factions that can be seduced through the Seductive Influence mechanic, though you can place them wherever you like for the most part. These cults can only be removed if revealed through the Protection building chain, and provide a very small amount of local corruption.

Tzeentch's buildings provide different factionwide buffs based on the strength of the Winds of Magic in the province, and change the Winds at random periodically. When enough of the cults are aligned, powerful advantages can be gained, for a time.

New Khorne, Nurgle, Slaanesh, and Tzeentch factions should be compatible with this mod, however they will may be unable to establish cults with their cultists. I also might need to manually include new Tzeentch factions as they come up.

This mod may or may not conflict with other mods that change cult buildings and their costs. I don't recommend using this mod with other mods that allow cultists to establish cults, as there may be conflicts, but you're free to risk it obviously. It would also probably throw off the balance, but that's just my opinion.

Let me know if you find any bugs or have suggestions, feedback is appreciated.