A combination of shortening and olive oil is recommended . Shortening adds crispness and the olive oil adds flavor. Milk adds taste and assists with browning and conservation. A blend of all purpose flour and bread flour is recommended. Pizza chains use a blend.
Bread flour produces a dough which is too elastic.
If you are making your dough by hand, use all-purpose flour only. The dough will be easier to manipulate. Don't roll the dough or work it too much . Gently stretch the dough to fit your pan. If it becomes too difficult, let the dough rest for a few minutes.