Originally Posted by
Wyssahtyn
Ishgardian dragonkillers are relegated to a possibility due to their uncertain usage. If they only fire harpoons as in Bismarck and Steps of Faith, then they're incredibly inefficient due to a low rate of fire and accuracy (since there's apparently no way to aim outside of a sense of good timing; Bismarck is too big to miss). For Bertha cannons, it's unknown if the Ishgardians made some modification to allow them to adjust their angle of fire high enough to be of use, otherwise the highest angle of fire would be somewhere around like, 30 to 40 degrees. All instances of Berthas being used involve firing at a target that they're either level with or slightly below of, so I doubt they did. Garlean cannons (more like mortars with their design) on the other hand have a high angle of fire, are apparently simple to load and fire since the WoL and members of his posse can handle them with ease and no training, and are presumably far more mobile than Eorzean cannons.