I don't think that's how they divide it, CNG puts the coinage of Persis in Oriental Greek and their issues don't use Greek. Indo-Scythian and Kushan coinage use Greek, but those are always in Central Asian.
The "EXTREMELY RARE AND IMPOSSIBLE TO FIND" descriptor that every auction house adds to Plato tetradrachms gets less true by the year. It seems to me that the consignor has been smart, and is sending them one at a time to many different auction houses.
The mysterious last-second bidder who shows up to push you to your max at Leu is a well-known phenomenon. He certainly seems to have an uncanny ability to nearly always bid an increment or two below the max, but never to win a coin.
Well, there's only one Triton a year; the consignors probably prefer to sell the coins now rather than wait a year or list in a lesser feature auction.
I would strongly recommend looking at price histories before bidding on any coin anywhere, blindly bidding will result in a very sad day when you eventually consign
It is probably Rida, only a small number of governors (Imad, Rida, Tamish, and Udayy) have their name in ObQ3; https://www.zeno.ru/showgallery.php?cat=6452