Updated Situation for the moment
11-13th level: (DM - Mowgli Working it)
Tyrien (PM), Heinrich (SdW), Eanos(JK), Relic(jbear)
Daylily(Systole) (Possibly)
Sylvain (Gerald007) (unlikely)
Levels 8-10 we have: (DMs - SS21 & DT)
Larissa(MFloyd), Lem(DT), Maui(jbear), Vincenzo(SdW), Weel Naxel(JK), Menik(Kenim)
Possibly 2 more 8th levels (PM & Mowgli)
Level 3-4: (DM - PM)
Muzdum(voda Vosa), Charity(Aura), Yosephus(TS), Darvus(Halivar), Delvin(resrick)
Possibly Mowgli's character
Level 2: (DM - PM)
Tamarie(Aura), & 3 from Road to Tritower
Mowgli, you have some time yet as Blancher's Revenge is going to last probably 2+ Weeks yet. It is one encounter, but it has not started yet and it is too hard to say how long the encounter will last. Looking at the character mix (Archer, Inquisitor, 2 Wizards), it will still be missing a melee type character (without Daylily) and have limited healing.
Aura, now there is no reason to finish Road to Tritower earlier than Return to Boar's Ridge. Once they do, I will be free to run both of those lower level games. It makes sense to have Tamarie switch groups for balance to make 4 players at level 2, they could be close to 3rd level too once free from those adventures. With Robert and Karra out of the picture, Charity would be the only one waiting until those two adventures finished (unless you wanted to spend some DMC to level her). How do you feel about running something levels 8-10?
SS21, looking at things there is no need for Thuvian unless you really wanted to, but we don't have any other 5th levels without Lindeloef's Robert. If you are really uncomfortable at level 8-10, you could take something lower down and I take a group up there if Aura cannot. But if you look at who might be in a Level 7-8 group below, that is not a bad way to gain some experience DMing a game that level with 3 Judges in it that know the rules pretty well.
Deuce Traveler, looking at things a level 7-8 would be yours. But if you would rather have something in the ranges of 2-4 that's okay. You also could have a second character into the mix if you want. You have plenty of DMC to level them up to fit.
Here is a breakdown of an option shifting some things around.
Group 1 Level 8-10: (DM - Either PM or Aura)
Lem(DT), Maui(jbear), Vincenzo(SdW), Weel Naxel(JK), Menik(Kenim)
Group 2 Level 7-8: (DM - DT or SS21)
Larissa(Mfloyd), Charity (Aura)(Leveled up to 7 with DMC), 2 Level 8's (PM & Mowgli)
Group 3 Level 3-4: (DM - Either SS21/DT or Aura)
Muzdum(voda Vosa), Yosephus(TS), Darvus(Halivar), Delvin(resrick), Mowgli's level 3-4
Group 4 Level 2: (DM - Either PM or SS21/DT)
Tamarie(Aura), & 3 from Road to Tritower