There has to be some limits on the combinations of skills, but I expect there to be a few skills with several versions, like rain, blood rain, fire rain, oil rain, etc. Most other skills will probably just have one other version, maybe it makes an AOE effect that's slightly weaker or what have you.
No, I do not think there will be skill-crafting like you can make any combination of skills, putting different parts together like legos. That would take a ton of different effects and a whole new system for designing skills.
Likely the main thrill of it is the sense of discovery, like finding recipes for new skills in a mage lab, and only being able to learn those skills through crafting. Perhaps its main focus will be generating hybrid skills where you need points in both skill trees the two skills come from to learn that skill.
Last edited by Baardvark; 29/05/17 10:17 PM.