Ballistas are pretty interesting. The only real downside was that their weight was way too high in the GBA-games. Tellius did it better, because they don't have weight (Idk about Judgral tbh). Also liked the different types of ballistas like they existed in FE11. Ballistas, which do physical and magical damage and catapults in 10, which can do damage in larger area (an area of 5 spaces). However 1-range bows were too OP in FE10 against flying units with their fixed might and too weak in the later game (unless for the double bow). It would be better, if the strength was added to the might like for each other weapon.