OK, many thanks for your comments. I was trying the easy summer instant action and was able to kill all the targets until the last waypoint. I run out of Mavericks and GBUs but I didn't send orders to my wingman, so I suppose I could kill all targets if I save ordnance in the previous WPs. From your list, I think I'm able to:
YES Following a flight plan
YES Switching waypoints
NO Creating waypoints from MGRS coordinates
NO Creating waypoints from Lat/Long coordinates
NO Creating waypoints from Bullseye offset
YES Using AGM-65, GBU-12, GBU-38, the cannon, Mk-82, rockets
MORE OR LESS Maintaining situational awareness in stressful situations
YES Radio comms with all three radios, tuning frequencies
NO Contacting in-game JTAC for target assignment
MORE OR LESS Night flights, including combat employment
MORE OR LESS Managing wingmen
MORE OR LESS Reading briefings and reacting to in-flight instructions
So it's obvious that I have to practise more and learn a lot about CDU and JTAC among other things.
Best Regards.