case 1:
hit/exp -> mhc
mhc (scaled) = floor(scaled unreforged hit/exp * 0.4)
hit/exp = ceiling(unscaled unreforged hit/exp * 0.6)
mhc = scaled mhc * modifier

case 2:
hit/exp 1 -> hit/exp 2
hit/exp 1 = ceiling(unscaled unreforged hit/exp 1 * 0.6)
hit/exp 2 = floor(unscaled unreforged hit/exp 1 * 0.4)

case 3:
mhc1 -> mhc2
mhc1 = ceiling(scaled unreforged mhc1 * 0.6 * modifier)
mhc2 = floor(scaled unreforged mhc1 * 0.4 * modifier)

case 4:
mhc -> hit/exp
mhc (scaled) = ceiling(scaled unreforged mhc * 0.6)
mhc = scaled mhc * modifier
hit/exp = floor(unscaled unreforged mhc * 0.4)