Decide whether you need a cocktail-ready spirit flavor (liqueur/syrup mixes) or a baking/cooking tart-sweet profile (lime + syrup).
Choose the closest option to Midori’s flavor target: melon-forward sweetness plus a clear lime tang.
Use the substitute ratio from the table; if your substitute is sweeter than Midori, reduce it slightly or boost lime to rebalance.
If the swap is watery or not “liqueur-like,” thicken the blend with extra syrup (small additions) and taste again.
For drinks, chill and taste before serving; for baking, adjust only once the batter/premix looks evenly flavored.