Today's a full-advent collab with L4D2 in about two hours, so be sure to support your favorite, if not all of them at once with HoloDex - otherwise this would be a good metric of where their numbers currently stand, which is probably why they planned it like this. Try not to get too distracted by the Baldur's Gate 3 bear sex during the streams, root for your favorite to show off how much of an MLG pro gamer they are - and, more importantly, keep the death counters at the ready.
There will also be an announcement during the stream, most likely debut merch or content involving them coming soon, either way, get your wallets ready
On the topic of Bijou, she would definitely benefit from starting her stream 2-3 hours earlier on average, so that if she goes full-on endurance, she gets a good chunk of people at the front-end through the stream, filtering out into Nerissa/Fuwamoco and Gura at the tail-end. Fuwamoco has a good thing going with their Fuwamoco Morning a few times a week to pick up the JP audience, perhaps other Holos will follow suit with their own endeavors. Shiori's perfect for the late-night timeslot, no adjustments needed, and I'm not entirely sure what to do with Nerissa. Depending on how their IRL schedules works out, Nerissa might consider streaming earlier in the day before Bijou, which should allow a smooth transition between all Advent streamers one after another. Perhaps around lunchtime or so, or a bit afterward? Something to watch while people are most likely eating, maybe catch a bit of the EU/JP late-night stragglers as well.