Healer’s Retribution in the Radiance traitline (first tier) reads:
“Gain retaliation when using a healing skill.”
This does not work properly with Mantra of Solace. It only grants retaliation when you cast the Mantra itself, instead of when you expend a charge.
All other traits and passives that active “when using a healing skill” or “when you use a healing skill” or “when you heal and ally” active on the use of the Mantra’s charge for both the Mesmer and the Guardian that I could find. This one trait is the only exception.
Main character: Winter Harvest (Necromancer)
[BICE] Black Ice / Maguuma Server