One thing though that I didn't see in the thread yet is, that Coincounter got 2 100ton ... moves. One is conal DMG, one is AoE. I didn't know that as well, until someone from the LS mentioned it to me. 100ton Swing is the AoE one, he charges up long enough to get away easily.
The other one is 100ton swipe, which is conal and only takes 2 sec~ to charge. If you run away in his line of sight from swipe, you will get hit no matter how fast your reaction is, if you run "through" him, or to his side, you won't get hit.

Need to pay attention to his actions more, or to his animation.

Swing=Is holding his club in front of him with both hands charging.
Swipe= Is holding his club with one above his head while charging.