I consider adding support for display entities through a mechanic could be a fair point for SkillApi as no other plugin right now is offering this possibility.
It would make the process of making skills much more diverse and complex, while removing the armor stand "solution" out of the way. Especially the fact that display entities are more flexible (you can scale the render & everything)

Here is an example of what can be made with it : https://www.reddit.com/r/Minecraft/comments/1223aco/the_new_item_display_entity_is_fun/ (it's also achievable with armor stands but you get my point)

This tool could be useful too : https://mlakuss.github.io/minecraft-display-entities-generator/

https://minecraft.fandom.com/wiki/Display#:~:text=Display%20entities%20are%20entities%20useful,summon%20or%20%2Fexecute%20summon%20command.