I can try helping organize though...
Right now, we have: At least High 6-A, possibly 5-C | Unknow. At least Low 5-B, possibly 5-B | High 4-C
1) Is High 6-A is Hibiki with X-Drive? If so, we should have a tier without it, in the likes of "Tier, Higher in Berserk Mode, even Higher with X-Drive". Or is X-Drive the 5-C Tier?
2) Since in S2, Hibiki's power increases only via Berserk Mode, isn't 5-B overestimating it? From your justification in the AP section, it seems the feat is from all the girls combined (The girls were capable of destroying the Nephilim right before it gained enough power to evaporate the Earth). If that's the case, then S2 Hibiki should be lower. Since I assume Hibiki was still stronger in S2 than S1 even with technically having only her Berserk getting more powerful, then maybe "At least 5-C, possibly Low 5-B with X-Drive and/or Berserk Mode". Please confirm if I'm correct about the interpretation of the feat, bc if it's a combined effort then Hibiki alone should be lower than 5-B, so Low 5-B seems better.
3) High 4-C was discussed earlier to be about a supernova, but I read that it's the enemy who created the supernove, not Hibiki or the girls. The girls tanked the supernova (if they were actually hit by it) but didn't create it. Defeating someone who can create a supernove doesn't mean you are as strong as a supernova. Ignite Module definitely makes Hibiki stronger and (I assume that) regular S3 Hibiki should again be stronger than regular S2 Hibiki, so I suggest "At least Low-5-B, Higher with X-Drive, Expodentially Higher with Ignite Module, possibly Tier".
Again, those are just suggestions, based on what has been said before and her profile's current state. Please offer precisions, justifications, feedback, etc.