Initially they were overwriting on the test server: https://forums.station.sony.com/dcuo/index.php?posts/1964018/ A change in the patch notes indicates a Healer would not overwrite the Damage from a Damager and a Damager would not overwrite a Heal from a Healer: https://forums.station.sony.com/dcu...te-29-and-sons-of-trigon.168053/#post-1978341 That may indicate that it now may work like POT, where only the 1st one down is applied. If that is the case, then No effect is applied from the second person. No Effect applied = Wasted power. It also does not indicate whether a Healer can overwrite another Healer. Just a Damager can not overwrite a Healer If it works like this, then there is case for not wanting 2 Celestial Healers in a Raid group. Testing needs to be performed on individual HOT powers with 2 Celestial Healers.