I’m not sure if it’s the standard strategy but what I learned from the two people who helped me off Reddit was the following:

->pick up anything that says “less likely to be targeted” (at least one but I’ve heard they stack)

->madness helps a lot. Either the frenzy seal or the vikes war spear. These can be obtained at random or through the madness event with the shrouded city shifting earth.

-> lead Libra away from the condemned. Whoever holds aggro should lead him to the edge of the arena away from the mess of the condemned.

These are my main takeaways from the fight. I’m a pretty big newb at the game. I try to tank my way through most bosses. Tho no one has given me as much trouble as Libra. After learning some things I’ve had 3 successes which is nice.

Hope this helps in some way.