I think that this should be an early offensive archery unit. Here might be some possible stats:
Javelin Thrower
Strength: 3
Movement: 1
Class: Ranged (Yes this is a new class of unit)
Bonuses/Abilities:
1. Can strike enemy units within 1 range (essentially like an airship), for up to 40% damage (up to 60% damage for mounted units)
2. 100% vs. Mounted units
3. -25% vs. Melee units
4. 25% Hills defense/attack
5. -25% Forest defense/attack
I also think that a few more pre-gunpowder units should be added, to add diversity. Here are a few:
Battering Ram
Strength: 4-6
Movement: 1
Class: Siege
Bonuses/Abilities:
1. Cannot defend - can only attack cities/forts
2. Ignores city defenses/the presence of walls, castle, fort
3. Does not ignore the terrain of hills
Ballista
Strength: 0
Movement: 1
Class: Ranged
Bonuses/Abilities:
1. Cannot move or defend
2. Can strike enemy unit within 3 range for up to 50% damage, always strikes for 50% damage (obsolete when unit is Medieval Era caliber or above)
3. Cannot hit units in Forest, Jungle, fort
4. Cannot strike outside of cultural borders
Slinger
Strength: 2
Movement: 2
Class: Ranged
Bonuses/Abilities
1. 100% defense in Forest, Jungle
2. 50% defense on Hills
3. -25% defense on flat land
4. 100% vs. Ranged Units
There are my two cents for the day.
Javelin Thrower
Strength: 3
Movement: 1
Class: Ranged (Yes this is a new class of unit)
Bonuses/Abilities:
1. Can strike enemy units within 1 range (essentially like an airship), for up to 40% damage (up to 60% damage for mounted units)
2. 100% vs. Mounted units
3. -25% vs. Melee units
4. 25% Hills defense/attack
5. -25% Forest defense/attack
I also think that a few more pre-gunpowder units should be added, to add diversity. Here are a few:
Battering Ram
Strength: 4-6
Movement: 1
Class: Siege
Bonuses/Abilities:
1. Cannot defend - can only attack cities/forts
2. Ignores city defenses/the presence of walls, castle, fort
3. Does not ignore the terrain of hills
Ballista
Strength: 0
Movement: 1
Class: Ranged
Bonuses/Abilities:
1. Cannot move or defend
2. Can strike enemy unit within 3 range for up to 50% damage, always strikes for 50% damage (obsolete when unit is Medieval Era caliber or above)
3. Cannot hit units in Forest, Jungle, fort
4. Cannot strike outside of cultural borders
Slinger
Strength: 2
Movement: 2
Class: Ranged
Bonuses/Abilities
1. 100% defense in Forest, Jungle
2. 50% defense on Hills
3. -25% defense on flat land
4. 100% vs. Ranged Units
There are my two cents for the day.