Discussion How to create effects on Combating System?

As a unity game newcomer, I practice creating 3D fight game like dark soul.

No matter what kind of fighting game is, I just find out I can't create the real hit effects like the game demo.

As far as I know, I apply Camera Shake to hit time, ParticleSystem to attack, and rigidbody for collision.

But the result seemed not to render as I had expected. Do I miss some import factors of creating hit effects?

Does anyone can give some suggestions or share us with precious experiences?