Here are two ideas from last night

:
#Recruitif <number> <number> <name>|<id>
This command, given to a
nation allows it to recruit the unit <name>|<id> only if:
The first <number> refers to a number from a table:
0: Pretender Dominion
1: Order Scale
2: Productivity
3: Heat
4: Life
5: Luck
6: Magic
7: Pretender Fire Magic
8: Air
9: Water
10: Earth
11: Astral
12: Nature
13: Death
14: Blood
The second <number> is how much of that thing (say... how much in Order scale) you should have to be able to recruit that unit (for values over 0 - its an EqualToOrGreaterThen condition, for value under 0 - its an EqualToOrLesserThen condition).
This could open up some really fun modding, like adding special units depending on your starting dominion. A pretender with Luck 3 might be able to recruit "Lucky Man", a unit which is so lucky it always somehow avoids death (=is immortal).
You could even make a mod erasing all nations and replacing their troops with pretender dependant troops, so all of the players can choose from the same "pool" of troops, depending on their initial pretender design.
#ScaleImmune <scale>
This command, applied to a
nation makes it completely immune to the effects of the scale <scale>.
You could use this command for thematic purposes (like a race of Diamond Golems - they don't care how hot or cold it is), or just for some whacky fun. (This command will also be useful with the mod I suggested in the previous command idea)