Grid MORA is FL220 and your drift down is FL180. What would you do? You have an engine failure.
With or without an engine failure, whenever you are NOT VMC and in doubt about terrain,
set your Radar to ON with Antenna at 7 deg down.
Radar distance circles will correspond to your Height above Terrain
for example,all inside of a 10 NM circle is dark
means you are 10 000 feet above Terrain
PS
You will see all terrain from -7 deg to UP.
Keep dark area above 5 NM (5000') never below 2.5
Try it when you are VMC for a start..
