Why does the AI choose Death Scales all the time?

[Endoperez]

#scale_chaos <nation nbr> <(-3)-3>
Forces the dominion scale of a nation to a value between
-3 and 3. Other scales that can be altered are lazy, cold,
death, unluck, unmagic. 3 means that the scale is fully
tipped to the right and -3 means it is fully tipped to the
left.

To give Marverni (nation 3) Growth 3, insert

#scale_death 3 -3 to the xyz.map file of the map you want to use. The modding pdf has more recent list of nations, if you can't find the one you are playing against from the map-editing pdf.