Here are all the current Mastery Missions and the order when they become playable (2 per week):

01 - Wing It 02 - Against All Odds

03 - Pathfinder Parkour 04 - Scatter Shot

05 - Vantage Point 06 - Pathfinder's High Jump

07 - Kraber Challenge 08 - Rapid Rush

09 - Pure Adrenaline 10 - Fire in the Hole

EDIT:

EDIT (12/07/22):

So Scatter Shot is up with Ziplining Invaders this week. I'm guessing it's just random now? Scatter Shot was usually with Pathfinder Parkour.