I seriously doubt the guide to the version of the game from over a year ago is going to be relevant anymore, ai seems a lot keener to stack up its doomstack and beeline to Normandy than before, have about 2 days leeway to get that army out of there attempting to reinforce it seems crazy. Don't have a save though France can and will start making and calling in allies into the HYW in this patch so its even more difficult your probably going to be at the mercy of something like burgundy jumping in on them but they seem more prone to attacking England for Calais than attacking France.