Captain Kestrel Empires and Puzzles Hero - Pirates of Corellia

Captain Kestrel is an Empires and Puzzles - Pirates of Corellia special challenge event hero. At fast mana, this red/fire 5* legendary hero can find a place both on offense and defense.  His special skill is somewhat situational, as the more mana an enemy has, the more damage they get. Generally I do not like such situational damage, but at least his is higher at the beginning of a battle, rather than the end, which can make him useful for both defense and raid/war attacks.
Captain Kestrel Empires and Puzzles hero

Captain Kestrel Hero Stats and Special Skill:

Base Stats:
Attack Defense Health
727 702 1353
  • Mana speed:  Fast
  • Element: Red / Fire
Special Skill:
  • Deals 215% damage to the target and nearby enemies.
  • The more mana enemies have, the more damage they will receive, up to 335%.

Captain Kestrel Ranking / Grading:

  • Attack: B+
  • Overall Defense: B+
    • Tank: C-
    • Flank: B+
    • Wing: B+
  • Titans: C
  • Raid Tournaments:
    • Rush: B
    • Buff Booster: C+
    • Bloody Battle: A
Overall Captain Kestrel Rating: B+
NOTE: I have given Captain Kestrel an overall B+ because of his fast mana and attack special.  But, I could easily have downgraded the Captain to a B or even C+.  Do you think he should be lower?