These are the mods that I use to improve the Imperator: Rome experience for myself, and I thought I'd share this humble collection that I've put together in case other players would find it useful. This collection heavily features the Invictus mod and its accompanying attachments (credit to SnowletTV), along with a few other bits and bobs for added flavor and user experience enhancements. None of these mods should dramatically change the experience of the base game, but there may be a few adjustments to AI behavior, events, and modifiers that the descriptions of each individual mod should specify in more detail.

• Better UI: Makes the UI better (obviously).
  
• Invictus: The big one, elevates the game's flavor, user experience, AI behavior, and a dozen other aspects into the stratosphere.
  
• Invictus Historical Pack: adds characters and adjusts mechanics to the vanilla Invictus experience with historical plausibility in mind.
  
• Timeline Extension: Makes the game longer (obviously).
  
• Full Mechanical Overhaul: Adds character focus trees, enhanced peace deals, more interactions with subjects, special Pops, and other new mechanics to the game.
  
• INR: Adds/overhauls rivers on the map and makes them navigable for boats.
  
• Virtual Limes: Changes AI behavior to make their invasions/expansions historically plausible, adds features to reduce possible bordergore.
  
• Fix Scorched Earth: Fixes those times where you accidentally depopulate a settlement by sacking it too hard.
  
• Clear Sky: Makes the map more readable by getting the clouds out of the way.
  
• Cultural Conflation: Allows Unintegrated Cultures to swap to an Integrated Culture if they belong to the same Culture Group.
  
• More Culture Names: Dynamically changes province names depending on which culture controls them.
  
• Map Modes Enhanced: Improves the map mode visuals, primarily for the political/terrain hybrid map.

As far as I know, the mods work all work together correctly in the order that they are listed here. If you experience any issues or have recommendations on how I should re-order them so that things work better, feel free to say so and I'll look at making the necessary adjustments.

***NOTE: I have tried using the Crisis of the Third Century Mod to increase late-game difficulty, but it seems to cause a slowdown in my game when I start a new campaign, so I've removed it from this collection until I can figure out what the issue is. If anyone has experienced similar issues and figured out a workaround, please let me know so I can take a look at the solution.***