Widely considered the best mod for realism, it simulates population, employment, and trade systems far beyond the base game. Downside: It significantly slows down game performance.
“Empires of Europe I find really shines if you pick an Eastern European faction. A lot of the weapon and troop customization seems focused there.” Reddit · r/Bannerlord Trying "The Great Revision" Mod - Country TBD
“Anbennar is definitely the single best mod eu4 has to offer. The sheer quality and amount of content it has to offer is unmatched and has some both narrative and mechanical experiences you wont find anywhere else.” Reddit
Players often praise the mod for its "weapon and troop customization," especially if you play as an Eastern European faction.
If you are looking for a deeper grand strategy experience rather than first-person combat, these mods are frequently cited as the "best in class" for realism and period immersion: