As some people like to say -- derisively, I might add -- "Read your tooltips."
There is some amount of skill in simply reading what a button does and thinking logically about how it might fit in with other buttons and the combat around you. It is actually an important part of the leveling experience to ask yourself, "Why did the game give me this action or trait? When should I use it?"
If you get thrown into one of those play-as-an-NPC solo duties and lack the curiosity to read your tooltips, you might very well lack the curiosity needed to get through any other bit of combat this game throws at you.