Correct order is:

1. Trim at zero and dual rate at 100% (ideally a fresh model memory)
2. Sub trim to get the linkage geometry correct (right angles are your friend)
3. EPA to get full lock, no more, no less, in each direction
4. Trim to get the car running straight on the track (won't need many clicks after correct sub-trim setup)
5. Dual rate to reduce steering if necessary for handling balance