With the tutorial from indie resources I managed to change the code so when you kill a monster it doesn't delete the creature from the database and it doesn't reduce it's hitpoint score from damage. Instead I added an integer to the player database to store a temporary hitpoint count for the monster, and managed to access it.
I feel quite proud that it did NOT explode or catch on fire or any other dire, unassailable error came up!
[GW2] Reasons to Slow Level my Revenant
21 hours ago