Actually, the Cleric casting doesn't give you 5th-level spells, it gives you spellcasting as a 5th-level Cleric, which is only up to 3rd level spells.  Levels in an appropriate Cleric prestige class might be a good choice...<br/><br/>Hmm.  Looking over Libris Mortis, though, I have to admit, I'm tempted to suggest the Entropic Reaper for a base creature. ^^; It's a pretty interesting melee-based monster.