Originally Posted by
CountMRVHS
Missile troops are definitely deadly in Fourth Age. There are some "historical" or "realism" reasons for this (IIRC medieval armies tended to have a high proportion of missile troops), and there are also lore reasons (Tolkien had a thing for bows). But gameplay is also a consideration. There is a fine line between archers being OP and completely ineffective.
We have toned down the wall defenses somewhat in the latest release. The original idea was that powerful wall towers were the only way to simulate a strong defensive position, given the difficulty of modifying cities' terrain. But we now have some very nice settlement maps, so the uber towers aren't needed. To me, the strength seems about right. If you're defending Helm's Deep, for example, the walls will kill a fair amount of the attackers, but they'll still be able to get siege gear to the walls in at least a couple of places.
You can of course tone down the attack values of missile troops, but I wouldn't recommend tinkering unless you make backups of your files and are fairly confident how to go about it. The values would be found in export_descr_units.
Before you do that, though, I'm curious - which units in particular are you finding overpowered? Are they overpowered for you, the player, or for the AI? What battle difficulty are you playing?