I think I'll go with Scoliopede as my speedpasser, even though it's weak to fire it's fast as hell and has Earthquake, I think it'll be fine
Get rid of Iron Head. It's not as strong as you'd like it to be, sadly. Replace it with Swords Dance so you can easily smash any foe with your increased priority move + buff
Yeah, that's what I had on my original Aegislash, I was just playing around with this moveset and trying to see if Weakness Policy was good enough on its own so I could free up a slot (it's not)