Salem

Meybe, made bonus amount bars dependent on Alloying and Sparks & Embers ?

Example
Bonus amount bars formula = (Alloying/1000) * (Sparks & Embers Value - 100)/100

Sparks & Embers Value = 1000
Base Set Alloying = 1000
will give bonus +9 bars

IF number bonus is huge it's possible manipulation two way
formula = (Alloying/2000) * (Sparks & Embers Value - 100)/100
give +4 / +5

or
formula = (Alloying/1000) * (Sparks & Embers Value - 100)/200
give same +4 / +5

but two other "mean"

Don't drink and Salem, please.