Stratics presents the most precise Interlude skill list in all of NA/EU/SEA. Ontop of being more precise than the official list, it also has seveal additional features:
Combined skill totals - Gives you the total skill point cost of a level.
Skill grouping - Allows you to click on a skill and it will show you the skill for all classes, very useful to compare skill costs, levels of the skill each class gets, etc.
Good luck! And Enjoy!
http://lineage2.stratics.com/content/library/skills/