Barbarian gearing nowadays is actually pretty standard. Titania's Glory, Legendary Tinkerer's Goggles, Legendary Family Recruit Sigil, Legendary Enforcer's Coat, Legendary Cloak of Summer, Devilscale Bracers, Legendary Hammmerfist, Legendary Lionheart Ring, Legendary Ring of Prowess, Legendary Belt of the Ram, Legendary Thorn Boots, The Heart of Suulomades.
There are some gearsets that make better use of cool items like the Bloodrage Chrism but this one has higher dps due to maxing deception bonuses as well as melee power.
Princze/Dazneus of Cannith
Drop improved critical as most end game weapons will have keen.
Falconry only real benefits from +5% HP bonus and 30% helpless. Shifter tier 5 gives same HP bonus while raged and if you have the racial AP only costs you 1 AP.
Vistani is marginal in my opinon for the points spent. Just from I have toyed around with.
Personal I would go for t5 and last core in ravager. Much more survivability than frenzied. Then spend remaining in frenzied and maybe pick up KtA in harper.
Do this and you will have a better optimized high reaper barb.
Don't do that, as you won't have access to Overwhelming Critical, meaning less DPS.
https://ddowiki.com/page/Overwhelming_Critical