My guild (like so many others) is trying to progress through NiM content, and they told me a while back that it would be better to get a def use relic over using my ephemeral mending (arguing that it's better for me to be able to control an extra cooldown rather than relying on a proc.) However, I believe I saw that (since 2.3) it might be worth it to stack the two proc relics (shield/absorb and defense.)
I came into an unassembled relic last night, so I have to choose whether to:
Upgrade my Arkanian Fortunate Redoubt to an Underworld, buy/trade for an Underworld of Shield Amplification Upgrade my Arkanian Fortunate Redoubt to an Underworld, start using my Underworld Ephemeral mending again Upgrade my Dread Guard Imperiling Serenity to an Underworld, keep my Arkanian as is (or vice versa)
Also, input as to whether my guildies are full of it or on the right track is welcome