Fred's lawyer wants the trial as soon as possible so I think her's will be first. Rita Newcomb didn't waive her right to a speedy trial so I think her's will be close to Fred's. They can't do the trials at the same time but they could be done close together.
As for the Wagner 4's trials, they have all waived their right to a speedy trial and Judge Deering has not put a time limit on Motion hearings so expect an incredibly long haul. Angela's attorney has asked for a change of venue and the others could follow suit. I don't know if Judge Deering would still be the Judge in a change of venue.
I do speculate maybe the prosecutors will decide the order of the Wagner's trials based on how the order of the trials might affect each case. They see George 3 as the mastermind so maybe they will think it's more strategic to do his trial first, or to do his last. Maybe putting Angela's first would pressure someone to cop a plea and deny her involvement.
Because this is 8 murders I don't assume that a plea deal (LWOP) would be offered to someone who decides to confess and roll on the others, especially if the prosecution has an airtight case.
However, if this is only a circumstantial case then the prosecutors might think it's worth it to give one Wagner LWOP in order to have him/her testify against the others.
No Wagner will confess and roll unless one of them has an emotional breakdown and does it in a moment of weakness. You can be so afraid of, not just the death penalty but also of living out your life segregated on death row, that you decide to seek a plea deal.
.........My 2 Cents........