The best way is to position guards with Intercept in the same area. Of course, one reason to have four is to make it so that you have replacements. In general, howver, it is the teleport murder that is the major problem (Royal Archer shoots Beastmaster, Beastmaster teleport Royal Archer into pack of Dire Wolves, Dire Wolves eat Royal Archer), though there are now spells with Anchor.
Of course, the best murder squad is Brogan Bloodstone supported by two Knights of Westlock and two Guardian Angels. When that hits the field, it is pretty much game over, as 14 dice of damage, which can stop two attacks per turn, is hunting down everything on the field.