Next I create a copy of the map to mark what provinces have been designated starting locations by the SemiRand program (note the map we play on won't have these marks on them, also I never bother to do this when playing a SP SemiRand map).
133 looks to be a nice starting place, I think I'll use that for the AI and give that AI a second castle in the north west corner. I read somewhere that if the AI starts with two castles it will devote energy to link the two, if this is true this should create a strong positioned mid game AI.