If you are like me and find the skill tree difficult to read initially, I have taken the time to create a class summary sheet that you may find useful. I've organized a summary of all of the keystones and I listed the passive bonuses from each class in easy to read columns. When using this reference, it is important to keep in mind that it is probably not as useful as a hard calculator for final character builds since you're probably not taking every single node of any given class (which is what this reference aggregates). Rather, it is best used to answer questions like "Where is the best place to get crit?"

Wolcen Class Summary Sheet: https://docs.google.com/spreadsheets/d/1Bg2iLAPOl30-3dcLnYkHvisFr6eixdpL0Yh8UEXgXD4/edit?usp=sharing