Increased armor of Mother 1st Phase from 160 to 200, since she has multiple damage locations the armor has to activate for each limb individually making it less effective.
Reduced stageHP and armor of Dead Isaac, Mother was not killing him in one swipe.

Increased stageHP and armor of some monsters.
Increased armor of It Lives! from 140 to 160.
Increased movement speed of Level 2 Charger and Level 2 Gaper.

Reduced stageHP of Attack Fly from 2.5 to 2.

Repentance Eternal Edition: increased armor of super heavy monsters, for example Oob went from 15 to 21 armor.

Added a folder named improved_&_armored_foes containing entities2.xml file for Improved & Reworked Foes.

Removed armor from Dart Fly and Swarm Fly.

Fiend Folio: Increased armor and stageHP of some monsters who have armor and stageHP by default.

Fall from Grace: Increased stageHP and armor of monsters. Increased baseHP and armor of bosses.
Vanilla: Increased armor on Singe from 50 to 60
Fiend Folio: Increased armor on all bosses.

THE FUTURE: Increased stageHP and armor of all monsters. Increased baseHP of Anguish, Gloom, Blight, Ruin and Acceptance to 400 to make them harder to kill with bombs.

Tweaked a ton of monsters with standards developed after making the entity file for Fiend Folio: Reheated.