I call it, "The Spammer"
Any Char. Is Compatible to do this.
1. Any Skill Would Work
first. (you can do this after you kill the enemy, must be lucky to find the spot where they will respawn, you can even do this while your enemy is alive ! XD.)
[For respawning enemy.
-- they are invulnerable alright...
try using skills while theyre invulnerable, wait after the picture comes out, then use another skill,. itll damage them surely
for enemies you just knocked down with a grab try using a skill that has a very quick duration,. then grab again