I use Spooky Plate on my aegislash. I want it to defensively hold its own while also dishing out damage, though I've considered trying a weakness policy mixed set.
would 252 Atk/ 252 SpAtk/ 4 Sp. Defense with a quiet nature work still for that, or do I need more bulk?
I tried maxing both attack stats and it's really underwhelming in terms of longevity. 60/50/50 bulk is very fragile, so most of the time if you're not OHKOing your opponent and it can hit you neutrally, it will OHKO you back.