Yeah, I only used those boots a couple of times before I realised how bugged the interaction with Carnage was; and still my Barbarian has inflicted an insane 126k damage.
Current stats nearing the end with Celestial Suite bonus are 21 Might, 7 Constitution, 23 Dexterity, 7 Perception, 20 Intelligence, 22 Resolve.
I probably made some questionable choices regarding talents/abilities, but here's what I went for:
Blooded
Brute Force
Carnage
Frenzy
One Stands Alone
Threatening Presence
--
Greater Frenzy
Accurate Carnage
Barbaric Blow
Weapon Focus: Adventurer
Savage Attack
Two-Handed Style
Effigy's Resentment: Grieving Mother
Gift from the Machine
Duel Wielding + Fast Weapons would probably have been better with that crazy dexterity and OSA.
I can't remember where I found them.