Define a good player

[Avatre]

However! Being a mentor shouldn't mean that you spew everything you know (or think you know) on anyone else not wearing a crown. Just because someone is knowledgeable in one thing or another doesn't mean the whole world is interested in their input.
I have seen a few mentors meaning well, but absolutely missing the mark when they explain away a whole fight that everyone already knows, or try to teach mechanics to someone who knows them but missed one by accident.

And, of course, there are also players that like going in blind and learning on their own.

In short, nobody likes a know-it-all.

That's why I said can, and not does. I typically only give advice in a Mentor Roulette(only time my crown actually shows anyways) when I see a new player bonus, but not always. And it's always the bare minimum of "kill this ASAP to have less hassle, dodge AoEs as normal and just do what you need to do" - not always in those words, but that's the gist of it.