[Hummingbird Pro] Optimization

Hello! I updated the WP backend, theme and plugins and out optimation scores dropped dramatically in the Hummingbird test. Our scores used to be giht 70's and now we are in the low 40's. I've made some adjustments, but I can't seem to get the scores back up and don't want to break the site, there are quite a few new items I am not sure how to best optimize, Things like:

"Eliminate render-blocking resources"

I have a whole lot of hummingbird resources that populate in this area along with google captcha and a few theme files.

Same applies for the "Remove unused CSS"

Any tips or help that can be provided would be greatly appreciated.

Thanks!