i really don't wanna say just "maul" or "durge", i think its pretty tough.
maul would probably use one side to deflect shots when durge flew up and shot at him(even if maul deflected one back at durge, the effect would be minimal). the only way maul would win is if he force jumped up at durge and seperated some key body part from another(even then durge wouldn't truly be dead)