If a download isn't available, pros use MTK Droid Tools or Miracle Box to extract a backup and generate the scatter file directly from a working device. The Climax: Flashing the Firmware
If you can share your exact phone brand and model, I can help you locate the correct MT6580 scatter file download source. mt6580 android scatter file download top
Open your downloaded scatter file in Notepad. The file should start with: If a download isn't available, pros use MTK