Then we should have countermining as well since there should be a way to... well... counter it.

Another  option could be undermining. It was used by the more technologically advanced civilizations too. Probably easier to do than ladders (just a guy with a pickaxe).

Like this? (next release will have it)  =============================================================================== == isles-r28  <- pack.zip    output: C:\x\mods\isles-r28, 12 files copied    mod.json: ...    ----------------------------------------------------------------------------    maps/scenarios/greek_isles.xml       renamed gaia/flora_tree_oak -> gaia/tree/oak  (3x, r27)    ----------------------------------------------------------------------------    maps/scenarios/delta.xml       renamed gaia/flora_tree_oak -> gaia/tree/oak  (3x, r27)    ----------------------------------------------------------------------------    2 maps: 2 changed, 0 needed nothing; ... =============================================================================== Result: no failures left - ...

Ladders are a common early siege method. It may be a good way to compensate for erm... less complex civs in case siege tower has a prominant role for others.

Aside from the Helepolis at Rhodes i'm not sure armored siege towers were that common. i think some factions could be able to uprade them to have artillery and to have rams (current model could be used for artillery siege tower since it has the firing port) Helepolis could be unique to Macedonians, a heavily armored tower with artillery (very expensive and you can only build one).