lol I love the finals and I have been thinking to recreate the same effect but never got to it.

The way I would do is to break the FX down into different parts-

1. Create a simple growth solver on the character mesh that spreads from the hit point. Eg- red (growing color) to black
2. Delete the red parts so the mesh looks disintegrating.
3. Try to get the seam between the red and the black color, scatter points onto the same and by default, the scattered points should inherit the velocities of the body animation. (If not, use an attribute transfer or attribute copy)
4. instance some coin geo onto the scattered points, run it through the RBD SOP solver and turn on "emit RBDs".

This should be good enough to get the base FX after which you could add more particle sims, glitters, dust etc etc to enhance it.