For Barbs?
None. At least, not without substantial buffs, which we cover here: 2.6.6 Barbarian Community Buff Proposal
Currently, the best LON build for Barbs is LON HOTA, and it’s pretty strong in Season. But once we have to equip those rings, we’ll lose about 4 GR tiers, possibly more.
LON Frenzy Thorns is, at present, pathetic, barely able to do GR 105.
Here’s hoping 2.6.6 brings some love to Barbs!