Priest end-game stuff.

[Treesh]

A priest with a lot of +healing gear will often rely on Renew as much as possible due to its supreme mana efficiency with +healing.
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Aleri relies on renew regardless of if she's got +healing gear on or not (most of her straight +healing gear stays in the bank since it's still not enough to give up the 700 or so mana I lose from trading out the equipment). That plus the occasional flash heal is usually enough to keep Gnolack healthy (except for those rotten mortal strikes and around a lot of magic users) and really doesn't draw aggro to me.