After season starts do the challenge rift straight away. Or in your case just start levelling. Just remember that people that did the challenge rift and gotten legendaries will be very much ahead of you in levelling time.
Wouldn't legendaries rolled at level 1 get outscaled pretty fast though? At some point, massive gains in toughness/sheetdamage should outdo most legendary effects, no? And that's assuming you even get legendaries at all, let alone actually useful legendaries.
I can't see this being worth it, assuming 4man leveling at tryhard pace.
Edit: or well, I guess you can pre-learn the Challenge Rift since the reset is on Monday, and you kind of want to do it anyway for Bounty mats, and Blood Shards are super available anyway... Starting to make sense.
Can someone tell me how exactly the Challenge Rift works on season start?
Can you somehow complete it just before a season releases, or are people (that talk about blood shards on level 1) going to take the time to do the Challenge Rift after the season begins? Because in that case I'll prefer to just jump straight to leveling.