What exactly are you trying to mod Aerion?
First, you can mod how much benefit you get from 1 "levelup point" when you put it in a stat. I THINK you can also mod how many of those points you get, but I'm not sure.
Secondly, you can mod how much a character automatically improves as he levels up. It should be noted that this is set to 0 for all sovereigns.
You can change the points you get:
<?xml version="1.0" encoding="ISO-8859-1"?>
<ElementalDefinitions>
<DataChecksum NoParse="1">
<Ignore>DisplayName</Ignore>
<Translate>DisplayName</Translate>
</DataChecksum>
<ElementalDefs>
<StatPointsPerLevelUp>3</StatPointsPerLevelUp>
</ElementalDefs>
</ElementalDefinitions>
Paste that into a new XML and you will get 3 stat points, of course it is changable.
@Heavenfall:
An interesting thing is that if you change it in the core file, the change wont take place, at least for me. Could be the reason why calling internalnames wont do anything? 