Jogo is estimated at 8 or 9 fingers so Gojo should be worth at least ten fingers as he managed to overwhelm Jogo's territory with his own. Given that neither element inherently counters the other, I assume that the expansion battle is based on amount of cursed energy.
Disaster Flames: Jogo possessed a volcanic innate technique that allowed him to produce highly concentrated cursed flames. He could generate flames or shoot heat rays from his palms or manifest small volcanic openings in the environment that erupted his powerful beams as well.