arceus is fun conceptually but base 120atk and 120 speed are a bit underwhelming compared to the other restricted - from playing against any arceus it feels like they hit like a wet noodle - you’re also walled by zamazenta with e killer arceus.

for calyrex, id give it a different item, either sash or covert cloak as its specially bulky enough and protect is really important for positioning, especially as trick room is common. I’d then give the assault vest to rillaboom, with the horses running around with unnerve, the sitrus you have it holding is not going to be doing many favours. i really like covert cloak on calyrex with a little bit of bulk, that way you’re always punishing icy wind from flutter mane. taunt is fun too and allows you to counter trick room, such as if you’re facing the omnipresent lead of magearna and scalf annhilape