Evaluate what this penalty is worth please

[FireLance]

At BAB +6, you have the option to take a -4 penalty on attack rolls to deal double damage.

At BAB +11, you have the option to take a -8 penalty on attack rolls to deal triple damage.

At BAB +16, you have the option to take a -12 penalty on attack rolls to deal quadruple damage.

All aspects of damage are multiplied, including damage expressed as dice.

 

[hong]

At BAB +6, you have the option to take a -4 penalty on attack rolls to deal double damage.

At BAB +11, you have the option to take a -8 penalty on attack rolls to deal triple damage.

At BAB +16, you have the option to take a -12 penalty on attack rolls to deal quadruple damage.

All aspects of damage are multiplied, including damage expressed as dice.

Mmm... diamond nightmare blade true strike....