Pitter
Boots Thief
I know you're big on the whole glass cannon thing but a good arena/stam set is way more useful in wsg when playing mid or a support role. You can't return the flag when you're dead and you sure as hell don't help your fc when dead
Evasion. Trinkets. AGM. Healthstones.
Again, what Arkant said.
I will add in an arena gearing section later.