Decide your priority: closest texture (AP/bread flour), pasta-like grit (fine cornmeal or couscous), or gluten-free (rice flour).
Use the listed ratio and keep liquid the same at first; semolina can be slightly thirstier depending on brand.
Adjust dough consistency: if too dry, add 1 teaspoon water at a time; if too slack, add 1 tablespoon substitute flour.
For a semolina-like bite, grind coarse substitutes (cornmeal/couscous) finer before mixing.
Taste-test for browning: if your recipe depends on golden color, brown longer or bake slightly hotter (watch closely).