My Clerics always focus more on anihalting the enemy before I need ot heal an epic Cleric could take on an army by himself, even an above 10 Cleric can take out a fair chunk of baddies, my Cleric in the only non sporadic and planned out cmapign is level 12, and can take out a good portion of an army using Blade Barrier and Flame Strike, along with Slay Living and Harm for up close and personal, and Holy Smite/Unholy Blight for Evil/Good groups, and for archers just Air walk over them and cast a horizontal wind wall underneath of you, they cant hit you and you are free to rain death upon their heads.