Recommend Occa Berry as that is the main thing that KOs it now. That should be the first item slot then followed by Mental Herb and finally Coba Berry. I have an EV spread meant to survive Abomasnow's Blizzard while the rest goes into defense because physical attacks are still used and it is never good to be 3HKOd by Terrakion's Rock Slide.
Calm Nature
252 HP / 180 Def / 76 SpD
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