PSA: Prid rune can turn Dark Prison with Chain Aura into a permanent aura

Even tho you are "wasting" one of the rune slots for a skill from your own class, I think it's worth using Prid to have Dark Prison up permanently (rather than 50% of the time) and to save yourself an active ability slot. I haven't really tested the damage reduction from Chain Aura but the passives that weaken enemies and fortify you are worth using all alone.

As minion summoner Warlock, I use the Nagu rune to trigger it.