So i had a look at this Naruto fighter and it had so many VFX during battles the camera trickery was hidden very well. Until the characters started running on walls was able to understand that the camera operated with these rules in mind
Firstly the camera tracks a point at the center of the combatants
Secondly the distance between them dictated a zoom in or out
Camera strafes left or right in a rotation of the combatants position and the central point
You've managed to pique my interest so will work on a demo