There's always the possibility that Lucius' timestop ability might just stop working (being able to accelerate/decelerate the flow of time within a certain space), or Yhwach would alter events leading up to a future that he forsees such that a close quarters combat becomes the only viable option in that fight.
Yhwach, even when "split" into many different parts, would be able to regenerate unless his Almighty was disabled for a moment somehow.
Yhwach, even when "split" into many different parts, would be able to regenerate unless his Almighty was disabled for a moment somehow.