Leadership 2

I did an Excel spreadsheet to calculate the percentage to cast spells using different numbers of power dice.  The table takes into account the possibility of irresistible force on double sixes, and it is covers casting target numbers all the way up to 24 and rolls of up to 7 power dice.  Casting number is the target number you need to roll to cast the spell. For example, a level 4 (+4 to cast) casting the enhanced version of Purple Sun (casting value 25) would look at the column for 21 since that's the number that needs to show on the dice for the spell to go off.