Page Speed Test / Enfold Child Theme

Hi,
I’ve been trying to make our site’s performance better by minifying css and js using Google’s PageSpeed Tools and have not been getting the desired results. Link provided.

I did use wp_dequeue_style to remove the parent’s css and wp_enqueue_style to add them in my child’s theme folder but moving them caused the site to have issues.

What’s the best method in doing this w/o breaking the site’s layout and functionalities? Also using minifying plugins can cause issues.

Kindly advise. Thank you.