We originally had plans to change the way the system works by changing the properties of Blind so that MND would affect its potency. The basis of this change was to reduce the amount of equipment you need to procure to make enfeebling spells more effective. However, after giving consideration to other factors, such as the need for INT for magical accuracy, we've decided to push back this adjustment as it would cause players to need both MND and INT to boost the efficacy of Blind.