I heard Leoreth made some buffs to Persia - as AI Persia is always abysmal, having to fight all the barbs of Asia by itself. So I decided to try out Persia - turns out it is still quite tricky. Silk Route (the major reason for me to play Persia) is decent, but spreads too late.
First of all, the Persian UU sucks like a vacuum. The BTS version was awesome because it had virtually no counter. The DoC version is abysmal because everyone has Axemen which absolutely slaughters your "Immortals (what an ironic name)". Actually, the success of early game Persia depends almost entirely on whether Babylonia has Axemen or not - they will almost certainly have Bronze Working, so you need to deny them their Copper asap. Fortunately for me, Babylon didn't have Axemen. So I rolled over them, as well as Phoenicia and Indie Jerusalem, as usual.
Shush was razed by barbs so I founded my capital on the coast Wine. I also founded a city on the mouth of the Indus, hoping that all those deserts and swamps would turn into Flood Plains soon. It turned out I had to wait about a millenium for that (Doh). Also China wouldn't trade Calendar on Pleased. Good for them.
Both Egypt and India had Axemen so I made peace with India (war on spawn) and focused on economy. Oracle bulbed Alphabet, got Math from China and Agriculture from someone else. The plan was to tech Currency and Calendar for Silk Route goodness, since Persia is basically located along the Silk Route. That's one reason to take and hold Samarkand (4 Silk Route resources in its range).
As Immortals are useless against Axemen (which everyone except Babylon had from the beginning), I built about 2 of them in total. I stationed my veteran Immortals in the Arabian desert and near Samarkand where they held off various mounted barbs. They would almost all reach 10 XP just this way, and still remain completely useless against India or Egypt. Instead I teched toward Construction for War Elephants. Took Egypt with my first batch of War Elephants, and noticed that Zara fails geography forever:
Zara would declare on me a few hundred years later accomplishing absolutely nothing. Meanwhile, two Silks spawned near Samarkand, and Silk Route was finally spreading, right after I'd already got all my essential techs (Currency, Construction, Metal Casting) in place:
Time to take India. With a sufficient number of War Elephants, and a few veteran Immortals following along for ceremonial purposes, I invaded India, and left their easternmost city alive to accept their Capitulation (and Meditation, for Monasteries). They collapsed a few decades later. Just what I need - an Indie city to screen out China's border unhappiness and barb Elephants.
With India in Persian hands, the 8% area goal was finally reached, and Silk Route Persia reached its theoretical maximum commerce output:
Which is still pathetic compared to say, Trading Company England. One reason is that China had absolutely no Silk to trade for - I don't know why. They built the Great Wall and all. I guess the AI is just incompetent like that. But I did keep China happy all game with Open Borders and very good trade route yields. Trade with Rome helped for some time too.
Then it's GA (with Mausoleum at Halicarnassus, it's pretty nice), and mass building War Elephants to deal with the countless barbs that spawn all across the Persian Empire. War Elephant is really the go-to unit for Persia, or anyone in the area really, as all barbs are countered by it. Camel Archers not so much, but I can't tech to Engineering early enough (I did about 5 turns before end game). WAR ELEPHANTS!!!
I'm a masochist, but I absolutely did not enjoy fighting off all those barbs. It's just tedious and annoying, with them spawning deep inside your cultural borders in completely non-threatening numbers. The best and only way to deal with this is to keep 3~4 War Elephants in each of your major cities. With Silk Route, you can absolutely afford it.
Oh, and Rome is included in the "barbs" category. Mandate Armies? Come on. I have half a dozen Shock Elephants waiting to welcome your pitiful little band. Come to think of it, I guess that's why Persia starts with Horseback Riding. Shock Elephants via Stable. That's the answer, not Immortals. India built loads of Shock Axemen to anticipate my Immortals too - but instead I invaded with Shock Elephants. Woohoo.
Victory:
Built about 12 Wonders in the end. GLH saved Persia. Otherwise it won't be able to tech anything.