[X] Goldfish
@Goldfish what do you think about using reached
Shadow Phase instead of shield other? It doesn't last as long, but it gives a 50% miss chance to physical attacks and a 20% one to magic. This fight probably won't last another 20 rounds, and if it starts casting we'll be able to use counterspelling to waste its actions while Richard stabs it. If it stays physical it misses half of its attacks without spreading damage around.
Spell Scourge instead of a second chains of light spell from Dany is also worth a second look. Depending on how you read the spell it could just flat out confuse the target without a save if they don't have a harmless effect to target.