When installed Dungeon Difficulty together with Guard Villagers & Illager Wear Armor (2 separate mods made by seymourimadeit/almightytallestred), Illagers always spawn with buffed armor. Guard Villagers even have their weapons buffed.
I used Mob Battle to indicate their gear below:

When installed Dungeon Difficulty together with Guard Villagers & Illager Wear Armor (2 separate mods made by seymourimadeit/almightytallestred), Illagers always spawn with buffed armor. Guard Villagers even have their weapons buffed.
I used Mob Battle to indicate their gear below: