To help offer better ideas, each week for the circuit allow us to choose any of the 30(soon to be 35) adapters to play towards. Can still only choose two a week so it would take the same time to unlock them all but would cut out the oh crap I missed the xxxx weapon this week, well now it will be 5 (soon to be 6) weeks before I can try again if life doesn't get in the way.
Edit: posted at the same times as other but I'm glad to see other with this idea, kinda like how with kuva and tenet weapons were truly random to start with what you got, now you can more so focused on what you want to farm towards.