You've already earned many Venice/HRE/naval and diplomatic achievements and these three build on that playstyle—pursuing high trade share and tight diplomatic manipulation in Italy (Venetian Sea), forcing core revocations through strong peace deals from a small maritime state (Core-fu), and leveraging imperial mechanics to become Emperor and decentralize the HRE (Everything's Coming Up Mulhouse) are thematically linked and achievable with your demonstrated strengths.