However, the name "Scythian" is also known as Sakha or Yakut. This was Buddha's tribe in Nepal/North India who ran that "end" or "tail" of the Silk Road. They also ran a vast area that included a good deal of India and Central Asia.
To make a long story short the Hindu Revival started up about the 2nd Century and they ran the Buddhists, most particularly the Sakha, out of the place to the degree possible. The Sakha returned to an ancient homeland in Siberia (which they shared with the Reindeer people).
Recovering nicely they invaded Korea and Japan in the 6th century. Today the head of that tribe is the Emperor of Japan who traces his lineage all the way back to the first Emperor ~ and he's a Sakha. Sometimes the Sakha are mistaken for Koreans since they set out from Korea to conquer Dark Ages Japan. Alas, the Sakha in Korea were just recent conquerers.
So, who were the reindeer people they consorted with and swapped daughters to? Were they East Central Asians, or West Central Asians with a modicum of blondism and red hair.
I don't think anyone knows at the moment, but if you look up Sakha and take a good look at what these folks look like you'll be scratching your head Fur Shur.