well me usually use DD build too(depends on my mood, most of the time it is a one hand dagger build). but yeah it needs a hell lot of cards(considering you got elite set already and at least a +15 headgear). The good thing about crit is it doesn't need that much items. and with the addition of Vanberk Card it is easy to achieve crit rate without using too much luk. and with the build I posted earlier, I damaged like 18k-20k without using FBH(that is in the best condition, not considering reducts yet, so it might damage like 10-12 only on shield users).
double attack actually most of the time kills for me. Or if my Magnum break from my TGs instantly cast lol