I don't understand the point about needing a Cleric, is it something specific?
They're the healer class for the most part, they can excel in other area as well but they make the best healers above other classes, so with the way combat flows right now with explosive barrels, special arrows, ground effects, insane triple attacks and things like that you often need a lot of healing during combat and are therefore almost forced into having a cleric in the party.
