Firstly, you're trying to take on WAY too much at once. Those alternate picked chromatic scales that Syn plays (what you're playing) is a really, REALLY freaking long-ass run. You're trying to practice the whole thing at the same time, and you're doing yourself a massive disservice practicing it like that.
This run is ungodly fast. Like, really super shreddy fast. So before I give any help, please be kind to yourself. If you can promise me the following, I'll make a practice video that I'd like you to do SPECIFICALLY to help with this:
1. Promise yourself you'll give yourself at LEAST 3-6 months to get it up to speed
2. Practice what I lay out for you for AT LEAST an hour everyday.
I don't know how often you practice or how long. But unless you're willing to dedicate at LEAST an hour DAILY to THIS alone, it will take you way too long to get to your goals.
So if you can promise me you'll be kind to yourself and give yourself at least 3-6 months to get it right, and give yourself an hour a day to practice this, I'll make a video for you that I KNOW is going to help you.
@Ed Seith is right, it's going to be a massive hand-synching issue, as what it usually is with alternate picking runs.
Also? Mad props for posting the video! This helped a lot!