The general idea for a DH is to try to increase your cirt chance, crit damage, attack speed and dex as much as possible without becoming a glass canon. Glass canons aren't effective anymore since the health increase as MP increases doesn't scale at all with damage output. For that reason, you need to be able to take some hits.
You want to try to get 40% CC, 300-350% CD, 1.6+ attacks per second, 40k life, 300-400 AR, 4k armour, and of course, 24% movement speed. With all that, you'll have a very balanced build. There are tons of routes you could take to improve your gear at this point. Start looking at it piece by piece seeing what you can get for your budget!
Hand crossbows eh? From what I can see from looking at high ranked DHs is that you want a high damage, high natural crit with socket for your main hand (calamity) and on the other either a DML or a danetta's spite. I don't know much about DW other than the fact that it's expensive. Take a look at this guy. He's a top ranking DH with a DW build. http://www.diabloprogress.com/hero/拉鍊裡的猛獸-3143/愛情獵人/7845368
That is quite the predicament. Better solution. Sneak into a University cadaver lab and just stick it in a drawer. You'll want to make up some fake tags and paperwork, but that should be possible. Best of luck!
Thanks! It's taken a lot of trial and error to figure out exactly how things should work. Your eHP is quite amazing given your DPS. 125k DPS and 570k eHP is great. Your CC is great, CD is VERY great, AS is great. It's hard to fault you really. The only things I can suggest are maxing out your gems and upgrading your mempo to one with high dex and CC. You can afford to lose the vit for the extra DPS. Other than that, just keep trying to increase your dex. Your rings could be upgraded. I see that they both have %life on them, so if you choose to drop that, you could probably get MUCH better dex out of them, as well as the two trifecta stats. Perhaps consider a litany for one of them if you want to make up the eHP then just overload the other with offence. Great build!
Legacy nats tends to have that effect. My personal opinion of legacy nats (and this is based on no personal experience, just theory and absorbing discussions) is that low end versions of legacy nats is generally not worth it. You lose out on tons of eHP and DPS from that. If you like the disc regen enough to justify it, there's nothing wrong with that. It's a different type of playstyle and some people prefer. It's hard to argue with permagloom!
As for increasing your DPS and eHP…. Your CD is great, CC is great, AS is pretty good (but you're using a bow, so it probably could be higher). I feel like a HUGE reason your DPS is low is because of your bow. It has very low DPS. For a bow, you need the damage where you can get it. Since you're limited to the 1 soc, you basically need something with high DPS, high natural crit, dex and the open socket. Yours has most of that, but not all. If you're set on bows, see what you can find with higher damage. Your right ring needs some work. Try to get a second trifecta stat on there, increase the dex and vit if you can.
For your eHP, try to increase your resists and HP. Those are both pretty low. Armour is looking good, but more is better. Try to at least double your AR and 40k life.