I had never barb'ed before- bot or not. I replaced the Frenzy Belt with a random ancient belt with near perfect stats unfortunately, because I was considering the Depth Digger route as well.
Right now i've fallen into a somewhat ironic yet effective 5pc Raekor (gloves, Anc chest, anc legs, shoulders) and 4pc IK (anc helm, anc boot, weapon), and RORG. The rest is all fluff with weak gems.
Running Charge (all rune physical), Frenzy (vanguard for speed), battle rage (for damage), wrath (for damage), COTA (fire for single target (plus IK4pc)), and oddly enough overpower with the crit bonus (the bot just smashes it all the time for free dmg/buff). I imagine I could replace the overpower with stomp/pull, sprint, warcry (with speed belt), or dull pain- but I am not really dying much.
Passives ruthless, berserker, rampage, boon of BK.
Right now its doing t5 and it basically FC's packs 1 time and they are obliterated- and chain FC's multipacks/elites. Then it frenzies RG's for a quick kill with trinity right out of the box. If it would charge the single targets more it would be gravy.
Edit: The only problem I am having is occasionally it goes nuts on a trial rift and results in a 35 ish Grift key which I don't want. I have it set to stop on wave 3, which results in like 18-20 usually but every other trial it goes apeshit and continues until it dies. I will probably do a clean rebuild of the DB folder and see if it continues- since it was not doing this yesterday.