Sargasso Empires and Puzzles Hero - Pirates of Corellia

Sargasso is an Empires and Puzzles - Pirates of Corellia event hero. Also known as Captain Sargasso, a lot of people think this is one of the least desirable 5* heroes in the game.  But, should we agree with that?  

At average mana, and after a buff, this event hero deals a decent amount of damage - with 385% on the target, but only minor damage to its nearby enemies. In addition those three get a healing ailment of -80%.  Not bad.  
Captain Sargasso Empires and Puzzles Pirate Hero

Sargasso Hero Stats and Special Skill:

Base Stats:
Attack Defense Health
729 708 1334
  • Mana speed: Average
  • Element: Purple / Dark
Special Skill:
  • Deals 385% damage to the target and minor damage to nearby enemies.(buffed up from 355% in August 2020).
  • The target and nearby enemies get -80% increase for any healing received for 4 turns.

Sargasso / Pirates Ranking / Grading:

  • Attack: B-
  • Overall Defense: C
    • Tank: D
    • Flank: C
    • Wing: C
  • Titans: C
  • Raid Tournaments:
    • Rush: B
    • Buff Booster: C
    • Bloody Battle: C
Overall Sargasso Rating: C
NOTE: I have given Sargasso an overall grade of C because he is not good for much of anything, as is generally believed. If he had fast mana, I would raise that up to B level, because then his special attack could hit more often in raids.  However, at average speed, with relatively low attack and defense stats, this hero is more like a 4 1/2 star hero, not a 5*, even after he was buffed a little in August 2020.  Do you think he should be lower?