Reduce level of spawning nemesis

I am trying to reduce the level at which nemesis spawn.
I was successful editing the files for each nemesis found in this folder:
------ database\records\creatures\enemies\nemesis

However the Beast nemesis’s level is not affected if I edit this file. Any suggestions please?

kuba was introduced in AoM, so will likely be in gdx 1 tables, likewise kaisan in gdx2