How is raid score calculated/gauged?

[Copper Sunrise]

I one-shot all opponents with my account and couldn't do the the same with another one yet, the first one had a lower rank. What does determine the score? Is having your hp reduced affect it negatively? Is it the same with backfiring weapons?

Edited March 4, 2022 by Copper Sunrise (see edit history)

[MechHeaters]

The score on your raid determines on how much HP you had lost on that raid which means it does affect it negatively and yes it is the same when having any backfire weapons and drones that you use on the raid which is why using those in the raid will have your score will be reduced more from the backfire