Slow archiving? Do u mean slow indexing?
If so, Disallow: / in second file will block indexing of your website.
Mediapartners-Google is Adsense bot.
So in your case better solution is 1st robots, but change User-agent: Mediapartners-Google to User-agent: * (meaning any bot).
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April 20, 2021: Q2A 1.8.6 released!