_ There is a simple test you can do to find out this . _
Attack yourself with Perseus and reach your gatekeeper (Perseus, I am choosing him for his shield and amasing reflect bonus), on it’s own the attacking Perseus cannot take him down (in my case) or takes him down slow BUT… add one long range unit in the mix, and the unstoppable gatekeeper goes down fast. I have resistance on GK it’s not that the Phonix hurts him with ?, I done auto attacks with Cadmus with hordes of units all type, GK one shots them all.
_ Its a reflect bug, it somehow amplifies the damage reflected. _