Just a trick someone told me about to fix blackcipher lag.

known about this for a WHILE. the only problem, is that you have to set that every time you relaunch; also; depending on the cipher version, it will reset itself OR d/c you, because its not using enough resources. sometimes.. SOMETIMES, adjusting BC will have negative results.

THAT BEING SAID... im using a certain program that restricts cipher in just this manner, at the beginning of every launch. and it appears to work for me. this last patch v152, i have a LOT higher usage on maplestory itself tho