Hi,
I'm afraid it's difficult to tell which is the best Practice, it depends on your environment and requirement.
For example , there is a link 605 under my root DFS-N , and there are there are 3 folder targets for it.
We set the referral for it by right click the link and chose properties ,then select the referral tab,
:
When you select the settings from the folder target as following, it will override the refer ordering configured above(1201.JPG)
In your situation, you can try to clear the box: Override referral ordering and confirm if it works for you.
Or try to set the other server which you preferred as the first target.