[2020] Question regarding Earthshatter Spikes damage

How is it calculated?

Specifically, does it 'store' the damage similar to impale in a way, or does it not store anything and calculates everything else the point of damage?

Example:

• Use Earthshatter
• Use intimidating cry
• Use ground slam to trigger Earthshatter spikes

Would this look like

• Earthshatter
• intimidating cry
• Ground slam * 2 + Earthshatter spikes * 0.7
  or:
• Ground slam * 2 + Earthshatter spikes * 2 * 0.7

?

Example 2:

• Use Seismic cry
• Earthshatter * 1.3
• Ground slam * 1.3 * 1.3 + Earthshatter Spikes * 0.7 * 1.3
  or
• Ground slam * 1.3 * 1.3 + Earthshatter Spikes * 0.7 * 1.3 * 1.3

?