Bit of a catch 22 on that one.
Fish suits have a limited number of charges to limit the number of attempts you get to attempt the fight. And unlimited charges makes the fight easier, because one of the difficulties with the fight is learning it. The harder it is to learn, the harder it is to win (Difficulty can come from a few different places). Yes, this is different than many of the other encounters in the game, because it has a fail condition outside of death. This is part of the intent behind the encounter. When we went to persistent instances essentially every persistent raid got easier. Chelsith is a little like our non-persistent raids, except the fail condition is tied to content and gameplay rather than "We tried for 10 hours and now it is time to go to sleep and get locked out for 3-5 days."
LINK
(Lyndro-EQ2) Re:Chamber of Destiny: Fish Suit Items need more charges!
