If I were running T16 Nats, I would have vault enabled in place of Companion (you don’t need the damage boost) and elite hunt with all the speed passives and Crimson’s enabled (assuming you have gotten lucky and gotten an early Ring of Royal Grandeur). On that note, I’d probably do a few Act 1/4 bounties to get a Ring of Royal Grandeur ASAP. You will open a few Visions along the way which will help.
Then I’d aim to complete 1 NR to unlock GR75 (and primals!) so I’d burn the keys on GRs to get more gear, then hunt for Visions to gear up for a faster farming build. GoD or UE would do me.
I can’t start the season until tomorrow afternoon but that’s my vague plan, gear permitting.