Quote Originally Posted by 416to305 View Post
I agree. There's no such thing as an "off-healer", just using it in this situation to describe the healer that is doing less healing and more DPSing at that moment.
Actually, there is. It's rather similar to a tank's situation where one tank takes the boss and one tank takes the adds or does heavily damaging mechanics like back in Second Coil Turn 4 (aka: Turn 8).

Personally, I wouldn't dub it "off-healer", but rather as "supportive healer". Not supportive as a healer with buffs, but to aid the "main healer" where and when it is necessary. Healers have only one primary goal: Keep the party in good shape. Staying alive is every party member's individual job, rather than the healer's job. But the number of situations where both healers are required their full attention at their healing duties are rare and short and often "fixed" somewhere at the end of the road by gear alone. These situations are often also only found in the harder content for the patch that is live. When the primary goal is met, the number one cause for wipes would be failing DPS checks under normal conditions. Be it gear checks, mechanic executions or even individual ability to perform their own role. Here is where the "supportive healer" can help contribute in. As the combined healing output requirement rarely requires both healer's maximum output, one healer or even both healers can spend more time and resources into other activities. Most of these would be helping meet the DPS checks with the current patch. If we were to look back at previous patches, healers were one of the prime picks to handle mechanics that can be passed off to the healers to handle.