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Most of the time I would go with relevancy over authority if it's a link to a page that you're trying to rank for. My general rule of thumb would be to try to get more authority if linking to my homepage, and more relevancy when linking to an internal page. There is really no "right" answer here, other than if your site's links are weak in one area (authority or relevancy) then pursue that one. And hey, how cool is it that you get to choose what page they link to you on!

Hi Nick, major thanks! That sounds like a great way forward and I'll file a reconsideration request! Luckily, the drop only showed for some internal landing pages and not the domain in general. Cheers from Germany and another thanks, Tobias