I am playing a Fireball/Frozen Orb Sorceress in normal. I have noticed that frozen orb, with only a few points, is way more powerful than the fireball that I have been investing in all game. Is it even worth it to invest more points in fireball? Or should I just keep putting points in Frozen orb? Fireball just seems too weak compared to frozen orb. In nightmare that would be even worse. Mana regeneration is no longer a problem. I can more or less keep casting frozen orb. I have already respeced on normal, if I respec for nightmare, what would you suggest, given that I want to keep frozen orb.