The best player in the world would not open up with 4 warriors and park them in the capitol every game, so the best player in the world would die (Vedic Aryans can hit from turn 20 on IIRC, sometimes just after you finish your first worker).
Well, it's easier to claim what the best player in the world is less likely to do than to explain exactly what the best player in the world would do, unless you happen to know her or him.
But, likely said player uses the BUG Mod and doesn't have this Event enabled, so if they were to play a game just to prove that they could beat an early Vedic Aryans Event, they'd probably do so with the pure intent of showing that they could beat it... and thus they'd do whatever it took to defeat the Event (such as settling on a Plains Hills square with a Plains Hills Forest in the big fat cross then spamming Warriors).
You can't squirm out of this I'm afraid.
I wasn't going to even try until you made this claim saying that I couldn't!
There is no way to put up a settler by turn 30 normal speed unless you open settler first (if you do this aryans can simply take both cities before you finish a warrior).
Well, sometimes (rarely) opening with a Settler first is the right play. Nothing says that you have to settle anywhere within range of the Vedic Aryans... you could settle this City on the other side of a neighbouring AI and use that AI as a buffer, for example.
There is no way to capture a 2nd city by turn 30 unless you're playing below monarch (is the best player in the world playing below monarch?) and even then, the aryans can magically spawn and hit your capitol when you move out to take this magical 2nd city you claim someone could possibly get by turn 30.
Since we're splitting hairs (I mean, we both agree that the Event is unbalanced and is out of place in the game--particularly when it comes as early as you describe having seen it), I think that we can somewhat disagree all in good fun, at least that's my intention. For example, rather than there being "no way" to capture a 2nd City, one could simply get really lucky with the Random Number Generator. What's to stop you from getting +2 Experience from Barb Units without losing any Health (or with Healing quickly), possibly having the Aggressive Trait, and then getting something like 5% odds (a made-up number) instead of closer to 2% odds (which is still possible with enough tries) of taking the City?
Besides, if you're going to die anyway, what's the harm in throwing a Warrior or two at an AI's capital (if that's all of the Military Units that you have at the time) or even better an AI's second City that doesn't have Cultural Defences (if they have such a City) rather than simply immediately giving up upon spotting the stack of Barb units?
Unlike Vanilla, BtS AI often leave many of their Cities defended by only a single Archer.
That early in the game, you might not even have to face whipped AI Archer reinforcements.
If you manage to have 2 or 3 Warriors, assaulting a City early on (i.e. that has low Cultural defenses) and which only has 1 Archer isn't completely a fool's errand.
Besides, you don't even care how good the captured City is, just that it is a City which you can possess for at least a short period of time.
You die unless every game you play you train at least 4-5 warriors before anything else and leave them all defending the capitol.
Who is to say that opening with 5 Warriors isn't a power move?
That's easily 2 Worker steals on a difficulty level where the AIs start with a Worker and also sufficient units to attempt a reasonable chance at successfully rushing an AI capital on lower difficulty levels.
Besides, another valid opening could be early Archery. 1 Archer and 1 Warrior defending in your capital would have a reasonable chance of fending off 4 attacking Archers, which should be very achievable.
Again, who is to say that opening with Archery isn't a power move... not only can you Worker steal but you can also succesfully choke multiple AIs. If doing so is your plan, it won't be hard to have your own newly-built Archer defender by the time that the AIs send any of their starting units as a counter on your capital.
So, there are two potential openings that not only could give you a decent edge (given the right circumstances--being isolated won't work) while also offering a potential chance to avoid an early Random Event screw-job.
The price this puts on one's empire is high enough to be a sucker play.
I'm not disagreeing here. It's a ridiculous Event based on its potential to occur quite early in the game.
I just looked up the Event's criteria:
The Vedic Aryans
Prereq: One player knows POLYTHEISM AND one player knows ARCHERY
Obsolete: NATIONALISM or PRINTING_PRESS or EDUCATION or GUNPOWDER or ASTRONOMY
Active/Weight: 20/200
Result 1: 4 Barbarian Archers (Standard size Map) spawn
Given that only 1 player needs to know Archery, even on a difficulty level where none of the AIs start with Archery, it won't take long for a single player to learn Archery. Then, as soon as Hinduism has been founded, "it's on!" Well, at least it will be when an Event is triggered.
However, I LIKE the idea of the Event, as often a human player will finesse the idea of ignoring early defense in favour of spawn-busting and/or skipping Military Units altogether. It's nice to have this well-used formula get messed-up every once and a while. However, it would be fairer if the Event had better requirements, such as (just thinking off of the top of my head here): 2 Cities minimum, the knowledge of Bronze Working by the targeted player (although you still have the potential to be messed with if an AI's Event decides to come after you instead, so maybe this thought needs rework), 5 population total across your Cities (for the ability to sacrifice your early game for survival by whipping defenders), and/or some later tech level, such as 1 player having the knowledge of Alphabet (in order to stick with the current theme of at least 1 player knowing a certain tech).