Hello,
here we can talk about self vision of the siege !
1 FIRSTTTTTTTTTT By default units attack instead of controlling (already done in a mod)
Some views
Units
Ballista : slightly increase maximum range and minimum range.
Catapult : increase minimum range, slower moving, reduce their ability to kill soldiers easily, slightly reduce their cost for compensate nerf
Tower Siege: Some civ have tech for+20 capacity, slower moving
For Persians with tech Tower Siege can attack building
Rams: Only attack structures, seats units and ships, damage +10%
Ship catapult: Too much snowball??? Expensive but op and very tanky, what are your ideas?
Ideas of news units ?
Men with torch : have decent attack on building and can burn tree, very little armor and bad at fight
Rider torch : Same as men with torch but more fast / have decent attack on building and can burn tree, very little armor and bad at fight /// For only 2 civilizations
Why not divide into 2 units Men with mallet ( 2 population-units with 2 mens and a big log with metal- as mercenary Kushite but more damage on building) and big ram (4population-same of actually with more life and damage)
Building
Why not develop the idea of undermining tunnels?
In order to collapse a portion of wall, with a big construction time and a very good range (which requires a bit of exploitation from the defender). Then attacker can pass soldiers by little number (garrison system of 5 spot). Said in another way it like a teleporter over medium distance provided that both ends of tunnel remain alive.
Bridge or pontoon construction, with mens and ship