Short answer: you don’t! Yngwie almost never nails this line, not in this video and not on the classic REH video. This makes sense, because as you’ve figured out, it doesn’t really fit his picking technique.
One instance that comes close is that the end of “Far Beyond the Sun”, where there’s an audible pause before the final few notes of the pattern, after the downstroke string change. What is happening in that pause, we can’t know, but from these clips we can surmise it’s probably some kind of alternate pickstroke that is awkward for him and requires more time.
It’s sort of a moot point. The answer here is that if you want to play this line, you have to pursue other options. Use a two-way sweeping approach like Batio does:
https://troygrady.com/interviews/michael-angelo-batio-2017/clips/arpeggio-sweep-hi-gain/
Or, if you want to stick with dwps, refactor the left hand, maybe using a string skip in the Gilbert fashion, maybe with a pull off on the top string turnaround.
And probably lots of other choices!