At this point, we’d advise maintaining where you’re at unless you’re completing Threshold/VO2/Anaerobic workouts at Level 9 or higher.
This will keep your training targeted on sharpening you up as much as possible leading into your event by increasing the amount of time you can spend in a given zone or your ability to repeat hard efforts, which are a couple of aspects of your fitness that sessions with higher Workout Levels tend to focus on in the Specialty Phase.
If you are completing Threshold/VO2/Anaerobic workouts at Level 9 or higher in your Specialty Phase, AI FTP Detection just got an update that will automatically trigger it to suggest a 2% increase to your FTP. Otherwise, AI FTP Detection won’t run automatically during the Specialty Phase so as to avoid significant changes in your training leading into your A race.
If you have AI FTP Detection enabled on your TR account, then the feature will automatically take care of all of this for you! 
You can learn all of the details about how it works here.