One of the advantage of paper clay is that you are able to apply glaze to your greenware piece and take it directly to a mid-range (Cone 6) or high fire (Cone 10) without having to do a bisque fire first. This is due to the tremendous greenware strength of paper clay at the bone-dry stage. The piece being very "thirsty" at this stage will suck up the glaze without any trouble. This uses less energy (either gas or electricity) and is more economical.
I had a greenware piece fired to Cone 5 (gas fired), bypassing the bisque stage without any problems. The art center where I teach and do all my firing does two firings in their big gas kilns - one at bisque and the other at Cone 10 reduction. If you have your own kiln, you may opt to try the one-firing method.