You seem to be getting a lot of flak for your take on Shaco but I just wanted to chime in that I understand your gripe about the wording completely.
Basically anything we put a “skill point” into can therefore be considered a skill, that’s the interpretation that I think a lot of players will have. In Diablo 2 for example, a +1 amazon skills item would raise the level of even passives like dodge / evade and so on, or a +1 sorc skills item would add to things like fire mastery or warmth, even though they aren’t active skills.
However yeah in this game, Shaco is strictly applying +skills to active skills, and sadly even though we have a raise skeleton and raise golem active ability, they aren’t on the skill tree where we can put points into them so they are just left out.
I just wanted to chime in to say you’re not alone in thinking the wording is cryptic, I think people that came from D2 might have the same interpretation you did. They won’t change it though I think, nor do I expect them to change the wording, probably something that players will just need to learn for themselves like we did.