To start with, I don't suggest 3healing any hardmode except for Beth'tilac. I think every other hardmode is better done with 2 healers, even with poor gear/etc. Putting an ele shaman or feral druid (3 melee DPS sounds less than ideal though) in that open slot seems like a really good fit to me, but eh.
Assuming the hunter is running marks, I don't see how expose is not a DPS increase.
Overall, your raid makeup seems pretty crappy...you're missing bleed debuff, sunder, CoE or 5% crit, 5% spellcrit, 4% sp.
You say you're missing sunder so you shouldn't be topping meters, but they are missing 8% spelldmg, 5% spellcrit, and 4% spellpower, so I think you're actually better off than your caster counterparts with the raid comp listed. However, I'm not arguing with you that they are underperforming, as I have no idea what the margin looks like, etc, but they are missing a lot too.
As for mutilate...if it means you can keep sunder up and provide CoE, it definitely seems worth it to me. Alternatively for a fight like Baleroc, I hear Subtlety is nice, which indirectly should provide CoE also, if you prefer it (hunter can CoE instead of 5% crit).
Also, don't overestimate the DPS needed for hardmodes now. With the cheese strat, Domo is 1-shottable on heroic (our alt raid 2shot it, first wipe was just a slow spread...with all sorts of bad gear and stuff, took 9min I think, so still had room on the enrage). Needs to be 2healed though.
XI Wiki



