Your dough and expectations for your finished product will dictate your final configuration. When we were figuring it out I made up at least a dozen cheese pizzas and would simply change up the time and the temp till we ended up with a pie that made me smile.
We bake with a XLT3255 also, and started pretty much where Tom suggests. We’ve ended up at 465 degrees for 6:15-6:25 and I have the top set at full open, 1/2 blocked, full blocked, and 1/2 blocked. The bottoms are full open, full open, 1/2 blocked, full open ( I think…I’ll have to recheck when we clean next).
My thoughts on the top fingers is it seems to give us a great initial blast of heat to start the baking…then I get a bit to keep it going on the next, and with the last, it seems to act as a final toasting of the cheese as that’s when it seems to brown off in spots just as I like.
We do bake off all three of our crust styles on the same speed and temps. We do a rolled out, “pub-style” crispy crust, a std. hand tossed, and a deep dish. The deep gets a pass with just cheese, then is dressed out to order, and sauced and goes one more trip. You’re going to love your XLT!