Your dex seems very low. Grabbing gear with more of it will solve both your armor issue and (partially) your damage issue.
You CAN do a3 with low damage, but you'll be playing an extended RNG game against certain affix combinations, and the odds are usually not in your favor.
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You CAN do a3 with low damage, but you'll be playing an extended RNG game against certain affix combinations, and the odds are usually not in your favor.