Let me explain in each sections:

• Normally in later stages of raid class 4-5 where many bosses resist crit we're forced to use either Tridon Zenia or Rhoa etc. Now with Gazia as the supplier of 35% all stats and 10% damage reduction this is no longer case and thus allows Raaga (190% total spark damage) to come back into the team. For some extra fun, activate Raaga's UBB for massive conversions to take place!

• Removing Tridon from the leader allows other BC/HC support to come back into play, especially Paula. While it's true that her BC/HC drop rates and stats may be lower, with Raaga and Gazia as lead this is really neglible. Having elemental buffs alongside HC/BC is actually slot efficient since it's pretty hard to slot in one in later Raid Class. She actually shines over Aneil and Quaid in battle against Arkem since she has slightly higher hit counts(better with Raaga), provides more buffs(slot efficient), makes thunder/fire/light(Estoreit's wings for example) part dies even quicker, and auto battle friendly (using Quaid forces you to switch to Raaga BB from time to time, using Paula means that Raaga can focus on dishing out heavy damage continuously).

• With Raaga in play, Zedus is not actually a good unit to put in the team due to crit damage buff which can kill the main body too fast or spark buffs overlap. This allows Hadaron to shine again. Hadaron loses in damage lately due to crit resist and buffs overlapping due to Zedus/Tridon on the team. Hadaron actually becomes more powerful with Raaga around since he can focus on Crit Resist part more affectively with Raaga's 190% Spark. This ensures that parts like Balmedia's tail or Arkem-Thunder will die before the main body (especialy with Paula's elemental buffs). Hadaron also gives 120% defense which goes well with Gazia's convert for even more attack for Hadaron and everyone. With all the buffs in place, even crit immune part will definitely die before the other.

• Due to Gazia covering Atk/Rec-> Def convert, we can now slot in units other than Melchio or Reeze. Andaria and Sargavel immediate becomes very awesome. Sargavel even allows you to slot in Medina for "say goodbye to BC resist" and "SBB spam is no longer dream". If you use Andaria, the last unit slot can go to Freya for additional rec buff which goes well with Paula for healing(Def clashes with Hadaron, but just use him after her), Bonnie for status ailments, Semira (whose 7 star is nearby) for more statuses , or Atk Buffer (read:Ciara's 7 stars) for more damage and defense. Low BB when attacked is not problem since you'll fill BB through Raaga and generate a lot of BC/HC anyway. If you need more healing, Rinon is always helpful.