The Mandalorian Dreadnaught was a modified version of the ancient Kandosii-class, the predecessor design to the Dreadnaught-class Heavy Cruiser. Designed as a frontlines support and attack ship, the Mandalorian Dreadnaught was capable of holding its own in a heated engagement.
Due to weapons configurations and mission profile, the Atiniir-class Dungeon Ship was far more effective than the dreadnaught as an anti-capital craft over the Mandalorian Dreadnaught. However, the dreadnaught found its own little niche to fill, thanks to the Xen'Chi invasion. Its mission profile allowed it to carry out its own independent operations without the need of a home base, and its fighter complement made it a dangerous adversary to many.
It would serve to pave the way for the coming of the new Kotir-class Cruiser-Carrier.