if you want it to be useful offensively as well, id go adamant and use u turn instead of stealth rock. (it has 135 atk, making stab earthquake and U-turn powerful) for evs, 252 atk and 252 hp (if you use this set)
K, well, you could use defensive spreads and still have EQ+U turn+2Hazards of your choice. With that great attack stat, it doesn’t need much of a boost.