I reread your comment, and I see your complication with wanting to ring one group of people, then the next, then the next
You could handle this with
QUEUE1 -- Front Desk 1, 2
QUEUE 2 -- Front Desk 3
QUEUE 3 -- Office Worker 4,5,6,7
This would never have been a possibility with a real "Shared Line" anyways because shared lines ring everyone simultaneously.
But keep in mind the amount of ring time that this could cause for someone who calls in --
They wait 20 seconds, no one answers Que1, they wait 20 seconds, no one answers Que2, then they wait another 20seconds for Que3 before FINALLY hitting a voicemail box.
This would be unacceptable for my clients to wait this long. Just something to consider
I still recommend Dynamic Member Queues because of the flexibility either way