Originally Posted by
Rilifane
For me, proactive means healing that requires planning ahead and will not work as well if you failed to do that.
While the healing itself may also come after the damage came in, setting it up took place way before. One example would be ASTs star: to use it efficiently, it's best to place it at least 10s before the damage comes in and in a place where the raid will be in 10s, not neccessarily where everyone is now.
Another example from a different game was Archangel Disc: you spent several GCDs before the actual phase of heavy damage setting up selfbuffs so you could heal efficiently once the damage started to hit. Although a lot of healing was in fact direct healing, it wasn't reactive because simply spamming a skill without setting everything up beforehand wouldn't have worked. Heals were far too weak for that.
Proactive isn't limited to shielding for me - it means planning ahead, setting things up and preparing for what's to come instead of letting it happen unprepared and then reacting to it.
Reactive would mean simply using any heal once HP bars dropped without planning beforehand.
In a coordinated party, even reactive healing is planned, like WHM lilies, so once someone reaches a certain level of gameplay they will never heal 100% reactive. Mapping out every tool available itself is proactive, even if the heals heal reactively. But most people I see in DF definitely heal purely reactively even with skills that are by nature more on the proactive side, like shields or Star.
Being as scripted as it is, FFXIV makes healing proactively much easier than other games but incoming damage is usually so low that even a purely reactive playstyle will get you through every content except some savage bosses.