Complex sentence: The Maharaja of Susang, a hill estate, was one of the two most important "zamindaris" in Mymensingh along with the Maharaja of Mymensingh, which was however the richest substantial estate in the district.
Split into simpler sentences: The Maharaja of Susang, a hill estate, was one of the two most important "zamindars" in Mymensingh along with the Maharaja of Mymensingh. The "zamindari" of Mymensingh (also called Mymensingh-Muktagacha) was, however, the richest substantial estate in the district.