Hi, I just noticed that there is a bug/error when purchasing the blue DK skill styles from the stylemaster vendor, and wanted to post this so the developers can fix it. It should be very easy to fix.

The subclasses required to unlock the ability to purchase some of the blue skill styles are incorrect:
Purchasing blue hearthfire requires earthen heart level 50, but hearthfire an ardent flame skill.
Blue chains requires ardent flame level 50, but chains is a draconic power skill.
Blue core of flame requires draconic power level 50, but core of flame is an ardent flame skill.

I recently unlocked Draconic Power level 50, and was excited to get blue chains. But unfortunately I wasn't able to, and since I have subclassed out ardent flame, it would take a very long time for me to subclass into ardent flame and unlock the blue chains. I assume this bug is left over from before the DK rework when chains was an ardent flame ability.

I know there are plans to add new DK skill styles in U50, but this was an issue I wasn't able to find addressed in the patch notes. I hope it can be quickly fixed and rolled out with the rest of the DK skill style changes in U50.