McDunno says:
My goals are probably different than his, too
...
Plus, having the mobile feat, I can easily run in, attack in darkness, then run out again so the other characters can see.
Yeah, I know you aren't being a pain about it :D You are one of the most story-focused people I've ever played with. You got a bit of power gamer DNA in your blood, but that isn't a bad thing. I'm the same.
Just to close the story, my frustrations with that student were always ameliorated when I reminded myself they were learning valuable social skills. There was probably nothing more valuable I could have done with him as a teacher - he steamrolled all academics, he just needed to learn how to interact with people. In the end, that's more important than my little DM secrets. He never quite 'got it' but maybe something will click later in life with the benefit of hindsight. After all, I'm sure I was a complete prick when I played RPGs as a teenager and I don't have autistic tendencies as an excuse!