Identify your use: sandwich/toast (need melt + punch) or baking/gratin (need melt stability).
Start with the closest flavor lane: choose a washed-rind cheese if you want the strongest limburger-style aroma.
Swap by weight using the table’s ratio (1:1 for washed-rind + raclette; use ¾:1 for gorgonzola).
If the substitute is stronger than expected (especially Époisses), reduce the amount and/or mix with a milder cheese to level it out.
For cooking, cut into thin shreds or small cubes so it melts evenly instead of pooling oil.