Well the developers refered to it as Relic+2, so I'm guessing that you would need to get the +1 versions before hand. They also mentioned something when they announced the second wave of Dynamis changed about relic/+1 upgrade items, so I'm guessing that they will drop from there somewhere, but nothing has been anounced other than they're upgrading it.

And, just because you won't ever call it relic or empyrean armor, doesn't mean that isn't what it's called. And if you don't want to call it that fine, but facts are facts.