Justice is a fan-made global mod.

I would handle skeletons like this: Warriors. 2/1, 1-1, 4, 5, 10 Archers. 3/1, 1-2, 5, 4, 10 + Immobilizing Arrows Fighters. 2/4, 1-2, 5, 5, 10 + Large Shield, Ally Protection, 25% Magic Resistance, Stunning Blow

Added 4 minutes later
And dragons like this: Bone Dragons. 28/28, 20-30, 170, 7, 11 + Death Gaze Ghost Dragons. 30/30, 25-35, 180, 7, 11 + Death Gaze, Curse Astral Dragons. 33/25, 33-38, 125, 7, 9 + Ethereal, Woe Strike