Running a 3 feat raid with Phase Limit, Batallions, and Rez Limit. When we made it to the damage phase of Epoptes and break his two shields outside, the boss doesn't become damageable and proceeds to wipe us. We attempted the encounter multiple times and it still happens. We left and re entered the raid, refreshed the raid, and all restarted our clients and still wasn't damageable. We switched Batallions feat for Challenges feat and we were able to complete the encounter .