Mostly writing this out for my own thought process, but if it's interesting for anyone else to read or if you have advice, that would be great too.
So I am about to get the exploration rewards for 9.1, and wanted some help with the 7 class crystal and 6 relic nexus crystal.
(By the way, I couldn't do the Orochi boss with Mags, got pinned in the corner trying to stack prowess, so just used Shathra, took longer, but worked fine, she has a long reach on her heavy counter).



Anyway, for the 7 class crystal, here are my thoughts:
Skill: already have Bullseye and don't need dupe; have Elsa duped; new Korg or Shang would be good, or dupe for SS, Falcon, Attuma or Chee would be good. So 6/17 (35%) chance of being happy with my pull.
Mutant: probably pass here because I'm already so invested in this class (ascended 6s or 7s).
Tech: also heavily invested; have Shocker as a duped 7, Sentinel, Warlock. Would really only be happy with Shuri or a dupe for Lady D; don't have Ironheart or Prowler but don't know much about them. So again probably 2/17 (12%) of being happy.
Cosmic: I have a duped R3 Vox, and also Medusa, SIM, Sersi. I have a 6 Serpent I could rank up and ascend but I haven't done it. What's intriguing about this class is I have an unused Cosmic AG, so I can dupe whoever I pull if needed. So would be happy with a new Serpent, AW, Nova, Knull, Terrax, Gorr, maybe some others too (Venom and VP, Gladiator, Odin, SS, Hype, Gamora). I feel like this is the best choice probably, except that I would be devastated if I pulled like Sersi or Red Goblin or sig 40 Vox.
Mystic: I have 3 R3s already (Shathra, Juggs, Isophyne). Would like new Kindred, Wong (for Necro), Kushala, dragon lady, Chavez, or a dupe for my Sassy, Destroyer, Dragonman. It's a really strong class, and only would be devastated with a sig 40 Wiccan, duped Sorceress, or Diablo. The only downside is that I am much stronger already with mystics than Cosmics or Skill. Feels indulgent.
Science: Would love a dupe for Photon, OG hulk, or spider ham, would love new Titania, Luke, Silk, Spot. Would be absolutely crushed pulling my 4th or 5th Spider Punk or Ant-Man or Morbius. So overall I think like a 50% chance of being happy, and 50% chance of being crushed.
Relic Nexus: I have these 6s already: science (Hulk duped), mystic (Iron Fist, SW), mutant (Wolverine and Sinister both duped, Storm), cosmic (Thor, Gamora, Venom), Tech (GG, Sentinel), Skill (Val). I really don't have a good feel of who I should be looking to get from the nexus, as far as picking someone new or duping an existing one. Definitely need to read up on some of the abilities again.