So with the scrapper we are getting another “On heal” trait that is not only completely useless with A.E.D, but also makes A.E.D harder to get right if you take it. In an effort to make non-healing turret heals viable on engineer, I belive ANet should take a look at when “On Heal” effects triggers with A.E.D.
My idea is simple, A.E.D should trigger “On Heal” traits and runes the moment A.E.D’s unique buff expires. In other words, when the actual healing is done.
This way, Cleansing Synergy won’t remove the condition that would bring you down to leathal health. Heal Resonator won’t keep your health above lethal with regeneration, but instead help keeping you alive while A.E.D is on cooldown. Same with Recovery Matrix, it would be a lot more usefull if it gave protection while the A.E.D is on cooldown and not while you are trying to take lethal dmg. Stimulant Supplier as well won’t heal you up so you don’t take leathal durring the A.E.D window.