I dunno, he's not likely to do a super significant amount less, and there aren't many classes that can handle healing themselves and another person to full without a healer. I guess with the spriest, though, they don't really need an ele, per say. Sigh, lol. Much as I hate to agree with benching an ele because of class, it's a sad fact that our single target and non-cleave target switches are both very weak in comparison to the vast majority of classes, and this fight is basically nothing but those two things.
5.2 cannot come quick enough, hahah.