Got it... finally - it was
Craft_Recipe_CriticaLabel
Craft_Recipe_CriticalChanceText
I'm sorry for posting another screenshot in german. I didn't modify the arangement of the default craft panel, so I hope you get an idea of what it looks like..
I included my XML so someone may try it out with the english localization.
The craftpanel was written using DaimonUI, but it should be easy to integrate it.
While messing around with the XML I figured out that most of the elements
kept their old name and just sometimes had to be in a new parent element.
That's the reason why I didn't try out every single label and shadow, but as shown in the screenshot the engine adjust them automatically.
I called it "fixedcraft" because my initial intention was just to fix the length of some labels that are broken in the default UI because of ignoring the longer strings in localized versions of Lotro..
Note:
The tree view could be about 27px higher. The given values for the tree view are correct. I gave up trying to fix that, I think the "buy recipes now" button is the reason why the values aren't interpreted correctly.