AW and their level are also responsible for troopsizes in tournament and spire. So, if you store one or more AW just bevor spire starts, your spire and later on tournament will be much easier, cause your troopsize and troopsize of enemys is really smaller. So, wenn tournaments has started, you bring back your AWs and get full power. So this will never happen, I supppose.
spire and tournament is fixed at the start of them.