-atk +deff Hardin

If he's your only Hardin, then I'd keep him unless you're totally not interested in Armor Emblem, or Armor units in general. He can still be used.

still good, just build him enemy phase. i pulled 3 -atk hardins and i didn't mind at all.he's still one of the most reliable units on my main team.

My Hardin is -atk +spd, and he still is one of my best units.
Of course I'm running him with Aether and Warding Breath, but he's good enough at any level of investment. And being def+ means he'll tank like a pro