Amelia: Which Weapon Refinement?

I got an Amelia and just set her up with distant counter. Her IVs are -HP, +RES so I know she'll get some good use out of distant counter. I thought maybe I could take this even further by refining her Slaying Axe+ with +RES instead of the usual +SPD? +ATK might be nice as well. What do you all think?