First of all, the BAU needs to sit somebody out.
Second of all, the next challenge will be LIVE. You don't need to have everybody on at once, but at LEAST one team member needs to be present at all times. More people online will allow you all to strategize more but as long as one person can make moves you will be fine.
Please fill out
this Doodle here so we can determine the ideal time for this.
I don't think this will take a horribly long time. I promise this will not be as bad as the Jaipur challenge in Super Survivor Bros, even though I admit I c/p'ed most of this announcement from the SSB announcement that scheduled Jaipur.