You need to get the actually skill first.
To do that just kill zakum with a party.
It has a nice drop rate so it wouldn't be that hard.
After you get get angel ray to level five then you can use ar 20. :][/quote]
^ To add onto that, you also have to finish all of the Zakum pre-quests before you can actually go with a group of friends/your guild. The jump quest is commonly difficult for people and I do not recommend getting someone to do it for you unless there is a reputable person that is known to be 100% trustable for doing the JQ for others. Personally I used to do it for people but I kinda stopped since I'm lazy and off to do other things. Either way though, I'd recommend you to keep trying for the JQ (it took me 4 hours to do it for my first time with some friends but after that, it was doused down to 30 minutes to 10 minutes for the present day)
I highly recommend that you do NOT buy an SoK unless you keep d/cing/dying due to constant lag from zak or you simply cannot do the JQ at all despite the amount of time + effort you put into it.