WordPress Admin Loading Incredibly Slowly

Any time a link is clicked in my WordPress dashboard, it takes roughly 4-5 seconds to navigate to the desired page. The exception is the plugins page, which takes 15+ seconds. After taking a look at the bottom up output in the inspector, it looks like jQuery is loading the wrong way, and doing so multiple times.

I am hosting the site with WPEngine and I do have to admit, there is a plugin overdose on this site. I'm wondering if anybody has a suggestion that may help, whether it be methods of diagnosing the problem plugin (other than one-by-one activation, which is inconclusive as I've already tried it on this site once) or a quick-fix to the jQuery note.

Thanks so much!