Restoration can be used to repair non-living destructible objects with health values, such as the flag-raising generators in the mission Capture the Flags.
When shooting an ally, the displayed percentage (6-66%) is the weapon damage converted to health.
For example: An ally with a max health of 200 at 20 Health is shot by a pistol with a damage rating of 40: with Restoration at level 1, they would receive 2.4 (40 x 0.06) Health per shot, while at Restoration level 5 they would receive 12 (40 x 0.3).
While in Fight For Your Life and being revived, Maya can shoot and heal her ally. This can be useful in the midst of an intense fire fight, where enemies may be too tough to kill for a Second Wind, preventing both members from becoming crippled.
Restoration can override the friendly-fire penalty from Krieg's Fuel the Rampage, granting healing albeit at a slightly reduced rate.
Caution should still be taken as Cloud Kill will still count towards friendly fire and can still down Krieg.
Healing damage done on an ally appears as red bubbles or orbs and, unless health is already full, the numerical amount of health regained.