The Sortie "Energy Reduction" condition also reduces the rate of energy regeneration.
Being idle for 2 minutes will cause the regeneration to stop.
Using only certain abilities off of cooldown, with the right build and duration/efficiency, Energy Siphon can allow a player to regenerate the energy spent on the ability before it ends, thus letting them use that ability infinitely.
Hildryn will no longer gain Shield strength from features that give Energy-per-second regeneration. She will still convert Energy pickups into extra Shield strength. This fixes an unintended mechanic where things like Energy Siphon would make her completely invulnerable during combat.