How i suppose to play with old Vietnamese in arabia?

I'm a voobly player, 16xx-17xx... and I'm not a baaaad player, I know to use a lot of strategies and have some good and bad civs.

I was playing Vietnamese x Mayans now, on Arabia. I thought: "well, Mayans... he will open archers, and they're cheaper... But he have eagles too... so my army should be Champs + Imperial Skmis/castle archers... with that combo I should win. And with that in mind, I started.

My map wasn't good, front gold... but had back wood, berries and Stone. So... front gold is bad, but I could dela with easily. I put a Tower protecting my Gold/main wood and closed the map very well. All this with a fine M@A open (I killed one vill, stayed in his base for 1 minute and half and killed his 3 M@A + Eagle Scout)... so it was a very good M@A open. He really did archers, a lot of them, but my transition to Skmis was very good and in feudal I was protected and had some damage in his base.

But after that was a downhill. He went Eagles to counter rmy Skmis, and find a hole in a fucking tree that on villager cutted IDK why. I tried to counter his Eagles with Long Swordman, and used Skmishs. I went 3 TC trying to boom and secure my resources, but it was dificult to deal with.

My impression is that even doind a much more number of archers his eco was better... And that what a feel in every game with Viets... their eco is just BAD. Fuck man... it's so frustrating.

How I suppose to play with old Viets? I NEVER won a single game with this civ except in BF or Arena. I just don't know what to do more with them in Arabia!!!

ps. Their Stables aren't good, and elephants are slow as hell. Impossible to counter a army of eagles, for example.