Eternal Edition: reduces armor and HP on Eternal Nerve Endings, Globins and Embryo.

Repentance Eternal Edition: changed Eternal Baby's variant back to 0 since I had set it to 1 by accident. Reduced Larry Jr. armor from 15 to 10, The Hollow from 20 to 15 and It Lives! from 120 to 100.

Fiend Folio: removed armor from Ribeye.
Added entities2.xml for IPECAC and Deliverance.

Repentance Eternal Edition: increased stageHP and armor of many eternal monsters. Nerfed Eternal Larry Jr. armor from 20 to 15.

Repentance Eternal Edition: gave all monsters stageHP and greatly increased armor values.

Buffed final bosses with more HP, making them less vulnerable to bombs. Increased stageHP and armor on many monsters.
THE FUTURE & Fall from Grace: increased armor and stageHP on monsters, increased armor on bosses.

Increased armor on Satan's 2nd phase (50 to 60).
Made a bunch of other tweaks, for example increased armor on Pustules in Corpse (5 to 6) allowing Bloodflies to burst out more frequently.

Increased armor on final bosses: Hush (140 to 160), Mega Satan 2nd Phase (120 to 140), Satan 1st Phase (50 to 60), Lamb & ??? (100 to 120), Ultra Horsemen (60 to 70) & Beast (120 to 140).

Reduced stageHP on many chapter 1 monsters, for example monsters with 10 HP had their stageHP reduced to 0.5 meaning they have 10.5 HP instead of 11 on the 1st floor, allowing for a kill in 3 tears instead of 4.

Gave stageHP to most normal monsters. E.g. Gaper (10 HP, 1 stageHP), means Gaper has 12 HP in Downpour 2.
entities2.xml without stageHP can be found in old_armor_expanded folder.