Ball Spell Damage Comparison
Ball Area Damage Avg Avg/Pwr
Coldball I 64 26-59 42.5 3.864
Fireball I 96 30-75 52.5 3.75
Shrapnel I 96 30-75 52.5 3.75
Coldball II 128 31-75 53 3.118
Fireball II 128 31-91 61 3.211
Shrapnel II 128 31-91 61 3.211
Manaball I 96 11-73 31.5 1.658
Manaball II 128 21-91 55.5 2.413
Voidball 128 1-30 15.5 1.292

All damage values are for direct hits.
Testing suggests that "splash" is 1/2 direct damage.

Avg = average damage inflicted
Avg/Pwr = average damage inflicted per point of power used to cast

All values expressed exactly if possible, or to 3 decimal places