Weapon: as powerful as possible, usually an ogre hook, maul, or something with a high damage die and fatal or deadly with a +3 major striking rune stacked with an astral, fire, and some other rune like frost or thundering
Armor: +3 major resilient.
Mobility item likes boots with +5 or 10 item bonus.
Bracelet of Hammers Apex Item. Bonus on athletics and tripping bonus.
Eyes of the eagle: Some kind of perception item.
Aside from what Deriven said
Shifting spider collar for free action energy mutagen at combat start
Eye slash as the perception item because it doesn't get in the way of any other face items like a goz mask
Soaring flight tattoo if you have no other source of permanent flight
Items for your three legendary skills
Greater phantasmal doorknob
Greater saurian spike if you want precise scent
Lesser potion patches with potions of quickness for single action haste at combat start
Nothing barbarian specific really. Just about every character in this system looks near identical when it comes to items.