My EU4 Strength Score next steps
Europa Universalis IV
You already have many HRE/imperial and diplomatic achievements, so forming the HRE, consolidating power with multiple vassals/marches, and owning both Protestant and Reformed centers naturally build on your playstyle and diplomatic dominance while remaining achievable together.
Starts With
A Kaiser not just in name
A Kaiser not just in name
Ends With
Center of Attention
Center of Attention