Fix Weakness on Ranged attacks

[Tagrineth]

Being weakened doesn't lower your effective level, so i'm not sure why you'd need to make lower level monsters more accurate to higher level players in order to tweak these parameters.

He's saying that while the acc floor for melee attacks is relatively high (like 20%?), the acc floor for ranged attacks is much lower (probably closer to 5%). For them to make double-weak ranged attacks hit more, they'd have to raise the /ra acc floor, which would affect low level mobs attacking players, because the floor on their racc would be much higher.