ok.
VERY short comment on playing Tlacatl in this game.
First, I must say that I feel Tlacatl are powerful civ. In this game, on the other hand, we do not play long enough to see some of Tlacatl-only units.
The map, with lot of jungles, make it very easy to expand. I believe that rapid expansion at the beginning of the game was my key to victory. I expanded incautiuosly, with something like 1-2 units per city.
The other thing that I used was whipping. Evil Tlacatl are perfect at using whip - they start with slavery & get special building associated with whipping. And the map that we were playing was perfect for obtaining huge amounts of food - farmed grasslands in deep jungles

I suppose, that this map put evil Tlacatl (whit they whipping mastery) at advantage over good ones, especially over Kshet with his Agriculture trait (almost of no use, there were already more than enough food)
But the key to my victory was one: going Cult of Essus way. First, I neglected almost all technologies that give units, so Nightwatch was a real blessing. Second, and most important, Gibbon - he is a VERY early hero-archmage. It means VERY early access to domination. During the game, he lost this promotion 3 times, but had more then enough xp to take it back. I believe, that I gained more than 50 units thanks to Gibbon only, especiall when I attacked Kshet. That not only gave me a rise in power, but also diversificated my army. Of course, Gibbon also had access to earthskin and regeneration, which was useful.
I feel that in this game Gibbon = my victory (or, at least, my early victory; of course I had some plans for later stage of game) and for alternative strategy
My biggest mistake was that I forgot about Tlacatl special priest unit. I built some shadow priests, but only in the late stage of this game. And they would be very useful before, because the only thing CoE lacks is access to healing.
Anyway, I believe that CoE is very good religion for evil Tlacatl, because of their shadow priests and their upgrades.
My other mistakes were small - unnecessarilly building Trojan horse, unnecessarilly trying to obtain powerful flesh golem, etc.