If a more concentrated developer and temperature brings more color, next time I used 1:5 concentration and temperature and bleach to clear the film base, leaving some silver in order to allow scanning. In fact the amount of dye is not enough to make a complete bleach. I had this time images like Pic. 3. I could conclude that the sky was better than the more shadowed parts.
Next time I used the same film I have been using (Kodacolor 200) but I used it as a 25 ISO film to overexpose the film. And now I had pictures like Pic 4 and 5.
I think it is clear that the more concentrate and the more overexposed the better in order to push the color developed by Parodinal. But I must still leave silver on the film for better scanning. Next step is to prepare a new Parodinal, using more Acetaminophen than usual parodinal has. Insted of 20g, maybe 40g or 50.