Originally Posted by
Niwes
its simple as this:
disc is a playstyle that is very veeery dependent on planing ahead and to "know whats happening next". its the opposite of a reactive playstyle. in myth+ you are 90% dependent on what others are doing. more detailed, you are dependent how the 4 other ppl react to the given afixxes. is a dps still standing in shit ? is the tank kiting correctly on necrotic ? and so on. you can plan a raid mechanic and predict what the raid will do in situation x, but you can not predict which of the 3 dps will get hard dmg in 5s in a m+ dungeon. so, "know whats happening next" is nearly impossible in myth+ dungeons. and thats the reason why disc sucks.
or in short: disc playstyle is the exact opposite what naturally happens in m+. reactive healing style is what is needed in m+, based on their nature. disc and m+ never will play well together. so, my advice: play holy in m+.
PS
to be clear here: i do NOT say its impossible to heal m+ with disc (regardless keystone level). i just say, since disc and m+ will never be in harmony, you have to play twice as hard, to achieve the same result.