How to beat the Exoprimal final boss

How do you beat the Exoprimal final boss? You've finally tracked down Leviathan and are about to put an end to his machinations after playing dozens of his Wargames. You might have expected a simpler affair more in line with Exoprimal's previous boss encounters, but this last one is a bit of a doozy.
If your team isn't familiar with the way this Exoprimal mission works, there's a very good chance that it'll mop the floor with them, which isn't preferable seeing as the proceedings can take about half an hour per attempt. To keep that from happening, we're going to detail the final boss fight in Exoprimal so that you're aware of anything you may need to keep in mind. While our review didn't give the game a glowing recommendation, this boss fight is one of the highlights.
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