Personally I think people are sleeping on the Tatars a bit atm. They’ve got a solid early eco bonus that lets them go up without building a mill, then a perfectly decent scout rush, followed by quite good cavalry archers and an extremely good UU.
With 140 hp and 11 attack, they’re basically equivalent in terms of stats with Cavaliers, except they only cost 40 gold instead of 75 and 50 food instead of 60, so that’s already a very decent unit from a cost perspective. But they also generate gold, so in reality you’re looking at more like 30 or 20 gold per elite keshik, which is much, much crazier. Heck, that’s cheaper than scout cavalry!
And even better, if you heal them up they just keep generating more gold. Play well and pick your fights and you can end up with essentially trash cavaliers. That’s pretty dang good.
Silk Armor is a perfectly decent tech as well, giving them cavalry archers and scout cav with seven pierce armor. Even better, they instantly get a +2 pierce armor upgrade when they go to imperial, while enemies need to research bracer and chemistry, so they’re ahead for a significant part of the game. Notably, fully upgraded tatar CA’s BEAT FU Mongol Elite Mangudai in an even fight. And that’s not even accounting for their hill bonus.
Last of all, Tatars should win every trebuchet war. They just have to wait for the other player to unpack their trebuchets, unpack their own one tile further away, and poof, they win. If the other player packs and moves closer, Tatars have until they’ve fully packed and started to move to pack their own in turn, then they just have to move out of range and blep, they’re winning again.
So you’re looking at a solid early-game eco bonus, some of the best cavalry archers in the game, FU+ Hussars, trash Cavaliers, and guaranteed wins on treb wars? That’s not bad.