who was the greatest ruler in the Kanem Borno empire?

Mai Dunama Dibbalemi was considered the greatest ruler in the Kanem Borno Empire. He ruled the empire from 1221 to 1259 CE and during his reign, he expanded the empire's territory, strengthened its military, and oversaw a period of cultural and economic growth. Dunama Dibbalemi was known for his military prowess and strategic alliances, which allowed him to conquer neighboring territories and extend the empire's reach. He also established a new capital city, Njimi, which became the center of political and cultural life in the empire. Under his leadership, the Kanem Borno Empire became one of the largest and most powerful states in West Africa. In addition to his military and political accomplishments, Dunama Dibbalemi was also known for his support of learning and scholarship. He invited scholars and intellectuals from throughout the Islamic world to his court, and he sponsored the translation and study of classical texts in fields such as astronomy, mathematics, and medicine. This patronage of learning helped to make the Kanem Borno Empire a center of intellectual and cultural exchange in the region. Overall, Dunama Dibbalemi is considered the greatest ruler in the Kanem Borno Empire due to his many achievements in expanding the empire's territory, strengthening its military, and promoting learning and scholarship.