The heal from the 5 piece set bonus of the Defending Warrior (Resilient Yokeda) armor set from Aetherium Archive does not function properly.
(5 items) When you block an attack, you deal 4000 Magic Damage to all enemies within 10 meters of you and heal for 100% of the damage done. This effect can occur once every 10 seconds.
The tooltip indicates it should heal you for the amount of damage it does. When you first log in or enter a new zone, this is indeed how it works. But once you do damage from another source, then the Yokeda proc will heal you for the amount of damage the previous ability did - not the amount of damage the proc does.
For example, make a toon with 5 piece Bahrahas and 5 piece Defending Warrior. Attack any mob, proc Bahrahas. Press Block. Defending Warrior will proc and do ~4000 damage, but you will be healed for the amount of damage Bahraha's does (~1100).
It goes the other way - this can be exploited to increase the heal as well.
eisley the worst