Actually the comic you're thinking of, Darth Maul Son of Dathomir, doesn't deal with the siege of Mandalore at all.
In that one, basically Sideous allows Maul to be "rescued" hoping he'll run home to momma (Mother Talzin) and lead him to her. By the end, Maul is still at large but his Shadow Collective is broken up and Talzin is dead.