Maybe these skills should be using the CombinedAttack UnitStat?
Unfortunately that won't work properly, as it will increase all combined attacks which includes elemental attacks as well. So what you get is you character with
2 normal damage.
1 elemental damage.
then if they used the combined attack stat it would be more like
3 normal damage.
3 elemental damage.
I've ran some tests and it appears this is how it calculating the damage anywho...