Meh, it won't be too much of a war. If the Empire brings the same forces to Darka that they brought to Eston, they'll roll over us. They have managed to keep 35-40K CS in a big blob as they walk across Eston.
The only chance we have is if Talerium and Tara stay out of it. At that point, it would be CE against Darka. We may be able to hold out against that for quite a while, if Talerium holds to the border treaty. That would make things interesting.