Aim to max your str and cha. You are a cleric so remember you can already give your armor/shield +5 as well as give yourself at least +2 to both str/cha with spells. So aim to get +10 cha/str and if you have any room after that get some con bonuses.
Alas I do not know tons of items off hand to give you exact pointers but you should easily be able to get the needed str/cha being a cleric.
Also:
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