Sorry OP I guess I just don't understand this gripe. You currently have the best possible weapon you can get until at least 3 weeks from now. And aren't you using your nexus to do the things required in order to get your poetics weapon? Not that you wouldn't be able to obtain your poetics weapon without your relic, but you are still benefiting from the work you put in to get it.

A maximum of 12.5% of the raiding community per week will have a better weapon than you and if your group is smart you won't have it until minimum the 5th week of getting the tomestone (I know it's not called that but you know what I mean) cuz dps should be a higher priority. And the raiding community only makes up what, 5% or less of any given server population? I'm not the smartest person on earth but I do know that 13% of 5% is less than 1% and that 1 more weapon damage isn't the same increase as the 3 or 2 more weapon damage in the subsequent upgrades after the 120.

You can change the itemization of your nexus at any time to accommodate the other gears that you get from coil/poetics to adjust for accuracy etc. whatever else you want. Nexus has been best in slot for every class the last whole month (if not longer?) and still will be for at least 15 days unless by some miracle people clear T13 (is ilevel 110-112ish even enough to enter?) and then being at the mercy of RNG. My opinion is that the relic is a really good investment. It will eventually upgrade to 135 and then rival (and beat with proper itemization) the dreadwyrm weapons but of course not before giving the raiders 6 months of dreadwyrm being the best available.