[Minomato]

Here's an idea: greatly increase the energy consumption of the jetpack, rendering it unable to cross over large areas, but still useful for scaling cliffs. Even though they'll be able to get away over a cliff or wall, they'll have to stop right on the other side, where you'll be able to fire after them if you don't have a jetpack to counter their escape. They still have an advantage, but it won't do them any good unless they're near a cliff or obstacle of some sort.