Any general tips?

I decided to knock out Pahlava first (I was real cheap, I took advantage of our alliance and military access. Does this make me a noob?), and then after many many years I have taken Chighu, the Saka capital. The Saka are pretty much no problem anymore, they have two settlements, one of which I made sure was economically useless (exterminated the population, got rid of every building I could) The other I'm sure isn't in great shape either.

The one problem I have is that I have a terrible economy. I have no ports to build up, being landlocked and all. Any tips for playing an (extremely) landlocked faction?

And on top of that, I'm at a crossroads.

I could gradually build another army to eventually take India, with the hope that plundering India will more or less jump start my economy.

OR

I could turn on Arche Seleukia NOW, and perhaps THAT would get the old economy going. Worry about India later, when I can just swoop in and take it all at once.

Any ideas?