Gunslinger Build (Lv. 10-200)

Do what you want, but invisible shot works for that purpose better.

If im correct, bomb has a much much much farther range than invisible shot if you have a high vantage point, off the screen far. If you can bring them to you without leaving your sniper spot, you have to worry less about taking uncessecary damage on the trip to the other side of a map to start another mob.