Starfield:Energy Weapon Dissipation

Energy Weapon Dissipation is an advanced tier physical skill that decreases the damage your receive from Energy Weapons. The highest level of the skill also gives you a chance to reflect damage back on your attacker if you are below half health.

Skill Increases
An easy method of progressing these challenges would be to dismiss any followers you have, and find a group of enemies with at least one enemy possessing an energy weapon. Kill any enemy that does not have an energy weapon, and allow the survivors to damage you while you heal yourself until the challenge(s) are completed.