I've found that you can coax some extra heat from an uncooperative oven via a cast iron "cookie sheet" (flat side of a griddle). https://www.amazon.com/Lodge-LDP3-Reversible-9-5-inch-16-75-... (flat side)

Preheat the oven with the cookie sheet inside, prepare your pizza on a lightweight cutting board. The trick is to slide the uncooked pizza onto the hot sheet. A dusting of cornmeal on the cutting board will make the pizza positively glide off, but purists will bicker…