Add 300% bonus to flying units, remove bonus to buildings, increase cost to 4 turns, add them as trainable units to Crypt.
This way undeads will have a bit better defence against flying units.Armored skeleton archer:
Remove miss chance at all.
just an update of units, addition of +1 range will increase their usefulness in sieges.Fire skull thrower and Armored fire skull thrower
Update their bonuses: 500% to all mechanical units, ships, buildings, towers, walls, 1500% to all Castle-type ones.
Right now they have 500% bonus to scaledfolk buildings.
Increase their range by 1.
They will become a bit more useful anti-cavalry units.Armored skeleton spearman
Add +1 range.
Another addition against flying units.Vampire-bat
Add 400% bonus to all flying non-mechanical units.
Add 2/0 armor.