[2.1][Video] 150 Fire Res Reduction Oro's Sacrifice Flicker

Here is one for the new skill tree

http://poeurl.com/zcF

Hi, I love your build, I have a lvl 88 duelist and this build is awesome.
2 months ago, I didnt know what to do with my duelist (my first character, a dual hyaons flicker strike ^^, about lvl 70). This build is a very cheap and effective build (I have 5 "cheap" unique items).

So, now, I do have some questions:
- For ascendency classes, I chose Headman, Brutal Fervor and Impact. I wanted to take the life leech one but I had to get rid of Vaal Pact and I couldnt sustain it. Was it the best choice ?

- How hard is it to get a corrupted +1 curse amulet ? I have some trouble crafting one, and I dont have a lot of exalts to buy one :/.

- How do you leech life ? I chose the doryani's invitation but is that enough ?

EDIT : And are you sure about the dps calculations ? Just to be sure with the maths, because the character chart says Damage per Use, and that you have 10 attacks per seconds, and there are 3 attacks per uses, so ultimately you'd to divide the calculted dps by 3.
But I dont know if that is already taken into the dps count.
Nice build anyway ^^.

BTW my build :
I like Unwavering Stance, but I have no idea how stun works and being immune to it is reassuring ^^.