What is suggested there, I believe, is that you should be ready to identify the tracks - in terms of key, or matching note content here vis a vis '_ mode' - by your ear.
Yes, that's right. But now I actually want to compose a track and wonder how it will work in the mix. That's why I asked for opinion of musicans who probably use different modes a lot. I never considered harmony of other modes before.
Keep in mind that I am not musican by tranining, I am engineer. I like to know how things really work before trying them, and the answer "everybody knows that" is unsatisfactory
Yet it seems that your first post, jancivil, confirms my belief.