well, guess i'll take all sources i can think of:
- of course, kRO/iRO patchnotes
- different forums
- iROwiki (thought iROwiki's a bit meeeh, due iRO was altered quite a bit compared to kRO)
guess i'd go iROwiki for the list, and compare it to the latest patchnotes regarding that skill
despite the majority of the NPC_ skills are 'final', the rebellion skills still are a bit tricky due balancing (last balance patch of those were Feb 12, 2014, so maybe there will be some more updates about that)
the 'new' 3rd class skills (ranger unlimit, RK water dragon breath, etc) haven't been changed since more than a year now, guess it's final so far.