It's impossible to tell what a spell does unless you add it to your rotation and watch it to figure it out for yourself. Skills should have descriptions. They should also show any conditions to casting them (eg. mana cost, only works on certain targets, cast time, cooldown length, what the damage calculation or expected damage is, etc.)
The damage calculation will be useful for balancing
It's impossible to tell what a spell does unless you add it to your rotation and watch it to figure it out for yourself. Skills should have descriptions. They should also show any conditions to casting them (eg. mana cost, only works on certain targets, cast time, cooldown length, what the damage calculation or expected damage is, etc.)
The damage calculation will be useful for balancing