Originally Posted by
Kuriisu
It is, trail of light and binding heal are amazing in 5 mans.
Holy also has better tank healing, disc doesn't even come close to what single target healing holy does with apotheosis up. And while without it yes maybe your shadow mend is healing for about 10-20ish% (mastery included) more then flash heal but you're forgetting serenity which non crits for 1mil (mastery included) and is pretty much on 8-12 second cooldown(4.5 with apotheosis), with added benefit that you can actually keep everyone alive whilst healing the tank (trail of light, apotheosis, PoM, DP, BH) rather then just the tank you're spamming shadow mend in to.
Holy has amazing stacked AE healing as well as pretty good spread AE due to Trails of light + Binding + Prayers.
In situations where entire group + tank are taking insane damage holy can actually manage extremely well while disc can't really do shit
Holy does more damage
Like it or not, holy is very flexible and just better at just about everything in 5 man setting. Disc requires other healers to cover for it's flaws for it to shine, that's why it will most likely be good in raids.
Of course you CAN play it in 5 mans, it's doable, but choosing disc over holy is just gimping your group as holy is far superior 5 man spec.