Very good guide. I just recently started a Saka campaign on 1.1 and I followed a fairly similar strategy to the one that you used. It is now in the mid 260s and I've got a steady economy and the Pahvlava are on their last breath.

I think that the Saka are much easier in 1.1 than in 1.0 because now you can take 5 settlements in the first year. (Sulek, Gava-Saka, Alexanria-eschate, Chalk, and Mazaka).

One thing I think you forgot to mention is to use foot archers against enemy horse archers.