I went erudite solely for the looks and I have seen 1 erudite cleric so there's the unique factor. If you play smart, you will be fine on mana (just let that monk pulling 15 mobs a minute know that you're in charge!). Granted I do sometimes wish I would've went human just because they look better in plate
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Pretty much, whatever head your going to enjoy looking at the back of for your healing career is what you should pick.