Wats possible and not possible through memory hacking?

Ok so ever since the bypass came out by asswhooper ive been using MHS to speedhack. I was wondering wat is possible and not possible through memory hacking?
So what i mean is wat types of hacks are server sided and client sided?
I know that ammo,HP,AP,SprintStamina,Kills, and Play Points are all server sided.
Other than those has nexon completely ruled out the use of memory hacking?
I also know that OPK is possible through memory hacking but how would one go about finding the correct pointers and stuff like that? Any extra information about CE or MHS and Memory Hacking would be great!