[Tournaments-HotA] Urfin Jus and his wooden soldiers

Something I don't understand, why was diplomacy banned in this tournament? Why are the pairs Kyrre-Mephala or Kyrre-Ivor, and not Kyrre-Ryland?!

You can only join units of levels 1-5. In my last game, my opponent had Diplomacy, which he used for demon farming, since he got it as his 3rd skill. Otherwise, Diplomacy doesn't decide anything. If it were possible to join level 6 units, then yes, absolutely, but as it is, the only use for it is for demon farming and some meat for Wyverns, though on most templates of this tournament there's already enough of that anyway.