I completely agree, that going forward, is not making new and more powerful runewords, but to bridge the gap between uniques and runewords. Me being stubborn and liking the looks of uniques, I have made a Doombringer frenzy Barb. Even wrote a guide: Unique using Frenzy Barb guide
Gist of it you need level 27 frenzy and 75% IAS to hit max breakpoint with Champion Swords. I have bought perfect and near perfect Doombringers, and even put an Ohm in the mainhand (and I will even put a Ber in the offhand). As is I can squeeze out 6000 damage with 4000 life. Or around 11-12 k with the double attack on Frenzy. I farm 8 player games the ice caves and WST, I have to pick my monster spawns of course, but I can blaze through the succubus and the skeletons and most of what is there.
You won’t need perfect Doombringers with Ohm runes in them. Above average with 40% ED Jewel will be just about the same. When that is said, the damage is on par with some good Oath runewords I suppose. Better min damage, and each swords gives around 300 life, and a large bonus to attack rating too. Cast weakness and are indestructable. I just like them 