Gunslinger Build (Lv. 10-200)

What's your guys' opinion on Air Strike vs. Torpedo? I'll provide a few points I've come up while thinking it over... Since we lack a skill to create mobs, we're generally limited to attacking mobs that have naturally formed on the map, which reduces Torpedo's usefulness despite its ability to be spammed over Air Strike. Air Strike however, does have greater damage and the clear advantage of hitting the whole screen at the cost of cooldown. It should allow for efficient training on maps such as Peak or Newties, where the Corsair can attack on a lower platform while casting Air Strike whenever a mob has formed above them without the need to climb ropes. For example, on Peak, the Corsair would attack the Nest Golems on the bottom with cannon, and with maxed air strike, take out the Skelesaurs on top every 10-15 seconds (2-3 Air Strikes) without ever needing to go up there, which also sounds pretty nice. So, which should be a greater priority to get first? I'm personally stuck on my own decision. D: