Pizza by slice

Hello Mr Lehmann, I am starting a small business selling pizza by slice.
My method will be to bake a pizza 16 inches with sauce and a bit of cheese in the oven until is 50% baked.
After this I will let it cool down and slice it.
When I have an order I will add the ingredients to the slice and another amount of cheese and put it back in the oven for another 2 or 3 minutes to have totally my pizza baked.
I will be using 58% water, 2 % sugar, 3% olive oil, 1,75% salt and 0,5% of IDY.

According to your experience are there other things I should consider to have a nicely crispy pizza?
Please advice me