What duty stations are best for a 92F to get promoted?

You have the perception that the duty station has something to do with promotion. Something you heard or some one gave you that idea. I don't think that you think duty location is the primary factor for promotion.
If you haven't already done so, talk to some higher ups in the 92F career field to learn and hear what they have to say.
I think a duty station is an important factor when it has an environment where you can learn and grow, develop personally and professionally, opportunities to deploy and work with other services and entities, where you and your family is taken care of on and off station.
Your promotion is going to come.
- Know and do your job better than anyone else.
- Teach others what you know.
- Be ready to assume greater responsibilities.
All the best to you!

Giselle Rodriguez Search on 92F to find the posts dealing with this MOS. To get promotions, be squared away, know you MOS and Army skills, be a team player, never quit, and always provide maximum effort.

Remember there are Time In Service and Time In Grade requirements to meet for all promotions at the E4 and up. Also you have to be in a unit that has an Open slot in their MTOE (Master Table of Organization and Equipment) for the next higher pay grade.