Harmony - Troop Symmetry

What if we change Black Rain and Arrows?

Yes, that's also a viable option: then it won't be possible to max out all three ballista perks, and at the stage when the "catapult" and "ballista" perks become available, there will be a choice between rate of fire and firepower.
This option will be considered.
For now, I'll leave the machines as they are in the latest version – we'll consider this as a refinement to be made after the release of the first version.