I am also worried about this. As far as I see it, the Relict weapon will stay on top of things and can be further upgraded in Future patches. Although you can get other iLevel 100 weapons since 2.2, I doubt they can keep up with a full enhanced Relict weapon. I have 6x Relict + 1 weapons and play at least 3 of the characters wearing them regularly. I can only hope they change the way to upgrade them in Future. I can't see me making this hunt more than one time. Even if I get some additional ATMAS doing random FATES (best tribes, need of GC seals etc.), the books are also very time consuming. But the biggest roadblock are the FATES. Not attractive at all for the first time, unthinkable to do this twice. Or thrice.