[help] Elemental Templar?

Trying to make this work, still very early theory crafting. Was wondering if anyone had made something like this that worked. I think the easy way out is to go paladin but I’d like to see how good I can make this guy.
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After spending most of afternoon on it this is what I ended up with. I built it in GDStash to see if it would work and it feels pretty gutless. Thought I’d leave it here in case anyone else was interested in it.