There are a couple of conditional orders I would use a lot that aren't on the drop down list:
Fuel less then 60%(or 55%) - Less then 50% on occasion has left my ship floating in space just short of the fuel supply.
Morale less then 100% (or deployment time less then ...) - TF Training I usually want to continue till deployment time runs out, Geology & Grav-surveys I often want to continue until near the end of deployment time. Alternatively a do for x amount of time would also work.