There seem to be an issue where Real Camera will show the head of the player if player uses a PlayerAnimator based animation in Epic Fight's battle mode, this problem doesn't happen if player is not in Epic Fight's battle mode (with filter animations on of course):

• Battle mode:
  Celestisynth:
  
  Iron's Spell and Spell Books:
  

• Mining mode (with filter animations on so just vanilla model):
  Celestisynth:
  
  Iron's Spell and Spell Books:
  

Note: I am using the latest Real Camera version ([Forge] v0.6.0-beta-1.20.1)

I've tried using Celestisynth's weapons in battle mode of Epic Fight, but everything seems to work fine