After that, a power field for the archers and a slowing effect on the Crystal Dragons.
Where did you get the power field? I haven't seen it anywhere.
Battle with 150 Crystal Dragons: Rylander (148 Elven Archers, 16 Monks, 11 Crusaders, 18 Unicorns, 1+1+33 Celestial Pegasi). If there was a Guild of Mercenaries instead of a Shrine near the dragons, then it would have been possible to struggle and get the maximum out of the battle! But as it is, first I slow them down, then I attack the 4th stack of dragons with 1 Celestial Pegasus. The dragons fly up to striking distance. The archers stand in the corner and shoot, and the melee units finish off the 4th stack. After that, a power field for the archers and a slowing effect on the Crystal Dragons.