The jets on your plasmacaster have iris valves which control the rate at which plasma is ejected. They can be narrowed to reduce the amount of plasma released, at the expense of damage, or widened to increase the damage and amount of plasma used.

Skill: PlasmaCasting
Command: PLASMA NOZZLE <SIZE>
Known: No
Lessons: 186 Lessons
Ability type: Noncombat utility
Base balance time: 1.00 seconds