So the question is which newly age eligible seniors skate on Challengers and which do JGPs i.e. Gubanova, Tarusina etc. (and assuming they don't get the final Host Pick).
My guess is that Anastasiia and Anna will do JGPs, and try to reach the JGPF/Russian Nationals that way, rather than doing CS events and Russian Cups. Of course they might get the final Host Pick, but there's a lot of competition and with the depth of Russian competition you never know who it may come from, look at Alina Zagitova's and Alena Kostornaya's progress this last couple of seasons.
However I think Anastasiia and Anna will do JGPs as above, but that skaters who might struggle to reach Nationals such as Elizaveta Nugumanova or Anastasia Gulyakova will do CS's - the Russian Federation has been doing a surprising/good job at giving all their skaters a chance on this this last couple of seasons e.g. real mystery skaters like Alexandra Avstriskaya.
Add in skaters like Serafima Sakhanovich, Valeira Mikhailova, Alisa Fedichkina and Alena Leonova if she still carries on, and I think that will be the 'CS team' for this season, along with the 9 ladies already on GPs who will use them as warm up events (the CS team will also act as reserves if anyone drops out of the GPs, though of course this isn't actually guaranteed).
Finally, there's the possibility of Anastasiia/Anna switching to late season CS events if their JGP doesn't go too well, plus do Russian Cup events to try to get to Nationals that way. This would be the same as the rest of the ladies on CS events, but that aren't on GPs.