This page shows all the Pyromancy Skills.
Spell’s_Magic_Damage = Basic_Value * Magic_Power/100 * (1 + Pyromantic_Power/100)
Some Spells have their special effects (i.e. Ring of Fire's 50% Ignite chance and -20% Fire Resistance). These effects are scaling additively from Magic Power and Pyromantic Power.
Special_Effect_Value = Basic_Value * (Magic_Power + Pyromantic_Power)/100
Page last edited during patch: 0.6.1.10