Adobe Distiller allows for multiple optimisations to be carried out with a single profile as opposed to the options available in Acrobat where you typically perform one optimisation at a time.
The Distiller profile attached below will allow you to flatten transparencies, convert the PDF into Apple RGB and more. Click the link to download it to your machine:
How to use the profile
Once downloaded, double-click the profile to open it up in Distiller and then ensure that the profile is selected in the "Default Settings" as seen below:
A PDF won't go straight into Distiller. You need to create a PostScript file first.
To create a PostScript file, open your PDF in Adobe Acrobat. Select the following to save your file as a PostScript file:
File - Save As Other... - More Options - PostScript
After saving as a PostScript file to your computer, open the PostScript file in Distiller. This should automatically run the Distiller profile that you had selected under "Default Settings" and save the PDF alongside the PostScript file:
At the end of the process, you will have a distilled PDF file in the same location as the PostScript file, ready to be uploaded to YUDU Publisher: