You need to override by creating a Mod_Units.bp and entering new values.
eg: To switch Angels to do 90 damage and change targeting priority, this is what I put in my Mod_Units.bp file.
UnitBlueprint {
BlueprintId = "rangel01",
Merge = true,
Weapon = {
{
Damage = 90,
TargetPriorities = {
'CATAPULTASAURUS',
'PRIEST',
'ALLUNITS',
},
},
},
}
Also check out this post if you want to do some modding...lots of good stuff in the entire thing.
https://forums.demigodthegame.com/376116