The one good thing about your idea to make a Battle Cleric is when you get bored, or just figure out around level 40 that this is really hard , you can just be a Cleric.
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So not the worse idea. I have done it myself a few times and found out it was about as good just to Root and DD. It gets pretty sucky not being able to hit a bull in the ass at times with their poor Melee skills.