Harder Pillager Raids

Pillagers & Vindicators should be able to wear armor during higher level raids. Maybe after you get the level 3 Bad Omen affect, pillagers & vindicators have a chance of spawning in wearing chainmail or iron armor, and the chances increase the higher the Bad Omen effect is. If the Bad Omen effect is level 5 or above, they could then spawn wearing pieces of diamond armor.

There should also be a new Illager mob that prioritizes in hunting down villagers. They spawn only when a village has 20+ villagers during a raid. They could break through doors and set fire.

Hard Difficulty: Raid level could be determined by the size of a village. For example, a village containing 20-29 villagers would automatically turn into a level 2 raid if the raid level was 1 beforehand. A village containing 40-49 would automatically become a level 4 raid if it was anything lower than that before.