Orcs – discussion about the race.

Chain Lightning is weak. It deals minimal damage, and you have to spend 1 turn to cast it.

You can avoid spending a turn on Goblins and cast Chain Lightning. To do this, you need the Sар-Iss Staff artifact (so that the lightning doesn't deviate) and the Sар-Iss Robe (to improve the Magic Resistance ability). This gives you a mini-set of Sар-Iss regalia and doubles the mana of the Daughters, which is enough for Chain Lightning.