Hello @help4bis,
Here is how you can work on getting better scores:
1. Go to Wp-admin > Hummingbird Pro -> Asset Optimization (Enable Advance Mode)
Screenshot: https://take.ms/0gTzO
2. You will see two sections
A: CSS Files(Assets)
B: JSS Files(Assets)
3.For CSS/JS Files
You need to first optimize using the first 3 options:
Minify(Compress), Combine, Move to Footer.
Screenshot: https://take.ms/5IPRP
4. You have to click on one file one option at a time then click save changes > clear cache and check the frontend.
5. If the frontend layout is fine you can move the next file/asset. If the Layout is broken then you need to revert the optimization for that save. Save changes skip that asset and move the next file/asset.
( Sometimes optimizing a core file/asset to the might break the layout of the site)
6. This process of asset optimization differs from each site depending on the theme and plugin used on the site.
The only way to improve this is by Trial, and error method. It is a more of Fine-tuning process and might a take while to achieve the best results.
Quick tips:
-In general, Move to footer everything, except jquery, jquery-migrate, and core theme js.
-If you have assets more than 100 on the AO page then you can try to optimize 3-4 files at a time. This will help you to speed the process.
-Do not optimize all files at once it might cause the site frontend layout to break.
– During this process, you can disable page caching if you want.
Please follow these guidelines before performing Hummingbird Asset Optimization
https://premium.wpmudev.org/docs/wpmu-dev-plugins/hummingbird/#asset-optimization
Also, for your queries and concerns, I request you to open a new thread from next time as it is not a good measure to bump threads opened by someone else as they would also be notified when you reply and that may disturb someone. I understand you did not in any way mean to do that.
If the above settings do not work for you or you have any doubts, feel free to open a new thread and we would be happy to help!
Regards,
Prathamesh Palve