You can't request times, the system assigns you the standby wait time. So it would mean you watching closely the wait times so you could grab a DAS at approximately the wait time before their Genie+ time.
Honestly it's going to be a drag and so much work ~ you really are better off getting Genie+ yourself, link your families on
MDE then have one person book for all of you. It would be worth the cost to me.
Then use the DAS on some rides in between G+ rides. You could at the parks see if they will add all of them to your DAS
list then at the rides pick 6 who get to ride while 2 sit out, snack or bathroom break.