Quote from risend;239700:
Crimson tokens.
This.
That is the fastest way.
Let's say you buy a 25k NX card. Crimson Tokens for 30 of them is 5,900 nx so... 25k/5,900 nx = 4 sets (you can get more with the left over, but let's just assume 4 sets).
That's 30 x 4 = 120 crimson tokens.
You sell each token for an affordable price of 35k each. 120 x 35,000 = 4,200,000 in gold you can get in less than a day.
You could essentially buy the whole set if you wanted.
Of course that is if you choose to buy NX to do this.
And if you do the above, you're essentially using real life money for a weapon/set.
So it's up to you to choose whether it is worth it or not. Though nothing is stopping you from waiting for a few weeks for prices to drop and for you to farm the money needed to buy them at that price.