At launch, will anyone do this? For context, if you use the challenge rift cache, you should be able to upgrade blacksmith to craft level 70 gear that happens to be tradeable. This gear can be used by other levelers once they hit around level 18ish to level much quicker this season due to that item level requirement seal.
I'd prob buy some 70s rares (at least a dagger) and a lvl 57 dagger to stash while we level while saving the cache for the alter. I'll check back at season start, just putting the idea out there.