What are the most common duty stations for a 15W MOS to get stationed?

You can be assigned almost anywhere. There are 15W in every Brigade Combat Team, in aviation brigades and plenty of other units.
You'll be assigned to wherever the Army needs you when it's time to graduate.

It depends on which platform you qualify on in Ft Huachuca. 15Ws are also located in CABs also. Once you know you platform and become qualified just be prepared for deploying. I have been in that field for almost 13 years and was a prior 15W before I switched over to the dark side. Best advice is to learn your job as much as you can at your first unit. Good luck.

PVT (Join to see) no guarantees. Show up. Do the work, be prepared. Train hard because your skill will be crucial to a mission.