I think there should be special Finishers/Takedown on Mini-Bosses, Final Bosses or Larger enemies types in which showcases Arena's devastating power, and shaping shifting abilities along with Kaser's skills and speed in Creativity, Style and Unity with one another beside using the standard Sync-Finisher on them.
Small Finishers/Takedowns when Perfect Parrying: Just a small prefect parrying Finishers/Takedowns animation, but on the Larger Enemies or Final Boss type only, and rewards the player greatly in damage, or towards stagger bar amount.
||https://www.youtube.com/watch?v=2aoJFGpX3vU || EX: Similar to these Cinematic Boss Finishers animation
All Boss Finishers.
00:00 Lord Buckhorn
00:30 Chronocore Sentinel
00:58 Victor
01:32 Mysterious Monster
02:03 Soul Devourer
02:26 Soul Devourer (Sword Mode)
02:52 Liquid Energy Entity
03:49 Giant Centipede
05:17 Aramon