Best AI, please.

[paleologos]

I 've never played Alx but I had an inconclusive campaign in BI vanilla with the Saxons. I remember I could keep West RE (and everyone else for all that matters) from attaking me by simply placing troops at river crossings and/or bridges. The AI would obstinatelly avoid fighting at those locations (who can blame them?). All provinces along the Baltic coast were mine plus Britain and Ireland and I discontinued before destroying the Romano-Brittish who had just emerged. I played that at medium difficulty for battles and very hard for campaign. I remember reading somewere that the Saxons were supposed to be a hard to play with faction but that was not my impression. If I play EB on BI will I be abble to stop the movement of AI armies by placing mine at bridges?