By chance, I happen to be up to the same point of HP2 in German, Japanese, and English too—from back when I was using the Heinrich maneuver. So I’m thinking, if I was to aim and proceed with those in tandem—possibly by replacing English with Dutch—then I’d have those 3 languages taken care of. And I’d be doing them simultaneously.
So let’s give that a go. I’d collect kanji while comparing the Japanese and the Dutch. And I’d also keep up with my German. Yes, I can see that working. And more importantly, I’d enjoy it too.