In "Roman's Grand Tournament," the amount of enemy HP you have reduced will be measured.
Therefore, any damage that exceeds the enemy's maximum HP will not be reflected in your score.
Regarding the above rule, please also refer to the following in-game section.
- Go to Home > Events > Roman's Grand Tournament > Join the Grand Tournament, and tap "?" on the right hand of "Roman's Grand Tournament" that appears on top of the screen, and move to the third slide "Total Damage Measurement".