I feel for you, as I know it well my first ever doberman in Toronto had wobblers, she lived with it 3 years after it diagnosed, I had no choice but to put her down at age 10,
Although back then the Vets' didn't perscribe anything, I noticed if it was humid or very stressed she was worse, Diet plays a huge roll i think also as I saw a huge change , when she first was diagnosed she couldn't stand up to pee or eat, she was laying down period, then i changed her diet, mostly raw back then and she was up and running around 9 day's out of 10, Huge difference. This helped her for over 3 years and was almost back to normal give or take a few rough day's out of the month.
At her age of 10 i was going through a very bad divorce, she just went down hill over night wouldn't eat, was very stressed and just went totally downhill practially overnight, 20 day's alter , I had to put her down it was the best for her, as she got pretty bad.