Re: What do you prefer to do in the early stages of a campaign when playing as Baktria?
Your thread inspired me to start a new Bactria campaign at the weekend, I used the same strategy, resulting in a similar position. Persia took the southern Aria region and Parthia declared war on Bactria - so, like you, I was likely to face a two-front war against Parthia and Persia.
It looks like defeating the early campaign Parthia won't be difficult, but Persia might be more challenging - I wonder if you (or other Bactria players) have similar experiences and what are the best tactics to use against Persia.
I agree, too, with your advice about securing your southern frontier by treaties with Arachosia.