Limit the scope of the victory. The Draka can say, hold out in the ME and Africa and survive perhaps into the 21st century.
Good approach.Take belgian and portugees colonies in 19th century,german colonies during WW1,french and Italian during WW2, all english after 1960....it would worked.
After 1992 it would be hard to keep it all,but if Drakia allied with China,it could work.
Or be more bold, ally with germans during WW1 and take entire Africa ,Iran ,Iraq and Saudi Arabia.Germany would win in Europe, so wait for WW2 started by France,England and Russia.Take part of Russia,and swith sides when USA start sending nukes at Germany.Take Turkey.And as much Europe as possible - if FDR gave it to Stalin,then why not to another monsters ?
In that case,Drakia would act as soviets during Cold war - which means,that they would fall for economical reasons,just like soviets did.Slave economic is not only bad morally,but also not efficient.
In other worlds,more bold Drakia would fall about 1990.
So,i would be more prudent to limit Drakia to Africa and ME.