Sindoi are already in through the Doryphoroi Pontikoi. For representing the Tauroi one should use the Sćrćgwćkha. Though they're translated as maiotian swordsmen they're meant to encompass the Tauroi as well(that's why they're recruitable in Khersones btw) because unit slots are quite tight due to engine restraints and I was givn to understand that there's not enough archeological data justifying another distinct unit.
In fact, the area is very well covered for the moment and the variety will only further increase once the steppe regionals are done.I you're interested in the north(west)ern pontic littoral you should keep an eye on the twitter feed in the near future
Edit: Too slow