
You have to ignore everything else but Morkite, this time even Nitra as you're not gonna want a resupply.
You need to mine all required morkite and hit the mule's drop pod return button before the mission timer hits 5 to 6 minutes, because that's when the first swarm spawns. You will probably have to restart a couple of times as a lot of it is up to RNG.
Pick the shortest mining expedition with the lowest cave complexity and mission length (200 morkite is the lowest requirement), and preferably do this when there is Dark Morkite available in the Abyss Bar, as that will definitely help you reach the objective in time. 2 players, promoted dwarves, and by personal experience, both Gunners as their shields will help tremendously when returning to the drop pod and waiting for the mule. Successfully complete a Hazard Level 5 mission from start to finish where no dwarf goes down and without ordering a resupply.