Radiant Retaliation seems broken.
It seemed weak in play, so i tested it in frostgorge sound.
Without the trait, my Guardian was doing 294 retal damage.
With the trait, my Guardian was doing 294 retal damage.
Testing stats:
1254 power
1479 condition damage
According to the wiki, it should be doing more like 420 with Radiant Retaliation.