Currently, standard lords of cinder are scaled to baseline star level based on the first flame creating the sun. However, we learn in DS1 from Quelana that Gwyn's second age of fire lasts for an indeterminate amount of time bellow 1000 years (based on her saying Izalith created the Bed of Chaos 1000 years before the events of DS1, and we know Gwyn was around long enough to go to war with the Demons before giving himself to the First Flame). Taking this at face value, we could say that Lords of Cinders and their souls can only support 1000 years of the sun burning, which if you calculating it out based on the energy output of the sun every second would only be High 5-A+. Basically, should the AP of Lords of Cinder be lowered based on this fact, or should we stick to using the GBE of a star for their AP.