First upgrade your amulet, then shoes, and then rings if possible (CC+CD+AVG DMG+DEX or CD+ASPD+AVG DMG + DEX or any other combinations).

For itemisations, you can refer to others profile here to get an overall idea on how to build your DH, like:-
- 2890's (http://eu.battle.net/d3/en/profile/SwSw-2890/hero/3515351)
- Lau Pan's (http://us.battle.net/d3/en/profile/wahlau-2762/hero/4700324)
- etc..

your overall ehp is pretty low. try work on survivability first, then dps. get more vit on pants and belts, and higher resist on chest/pants (>65 range)

your dps is pretty good. crit chance is nice too. try dropping sharpshooter with night stalker. get more attack speed if you wanna improve dps. however this is not in the main upgrade as i think you need higher ehp imo.

smoke screen is big discipline spender if you have only 30 disc. perhaps you can try use gloom, it would be good to tank at least 2-3 hit before getting killed.

@fallenrav

Polarzbearz told you to refer to mine but actually his is better. Way more EHP and AR than i do.

I'll help you but i need to know how much gold you have, what is your playing style (DW or 2H) (hybrid? tank? glass canon?), do you want more DISC? or don't get extra disc but more EHP? what active skill sets you prefer?

Well first things first, let's go through the skills that you might want to use. Give it some thoughts.

You have to pick one hatred generator which you feel suits your play style and one hatred spender as well. You need to decide this because you could get a bonus on the DML. Since you have no much gold, i reckon you avoid DML with disc. The rest should be cheap. Try to get a DML with AS 20 percent and the bonus to the hatred generator of your choice or to the hatred spender.

if u think ur DML does not need upgrade first, you should upgrade your pants. A DEX + VIT + AR + 2OS pants shouldn't be expensive at all. Check out Inna's pants as well whether it suits you. If you like inna, get VIT or AR roll on it if possible.

Once you figure out what you want here, get it and farm more gold and report back. I'll let u know more on part 2

Playing style / build wise:

I see you using SA + ShSh + Archery. Try dropping ShSh for Tactical Advantage, it's crazily effective for kiting and keeping max distance / off-screen distance from elites at a lower-cost (than SS). Also instead of using two hatred generator skill, use only one or the another (HA is more suited IMO, due to it's nature for kiting, and also since you're already using it for packs.). After that you gotta need a skill to deal with mob packs, which I prefer Elemental Arrow due to it's range & number of hits (good for proc-ing Night Stalker; if you are using it). As for Smoke Screen, I tend to replace it with Vault:Tumble due to 1) lower discipline cost (spammability) and 2) easier to use for keeping distance (press-aim-continue shooting). Instead of using ferret, I use Bat for better hatred regeneration to spam Elemental Arrow: Ball Lightning. Shadow Power: Gloom is a must in almost every build - for elites / main HP regeneration skill, especially reflect damages.

So you skill build should look something like this:

Hungering Arrow: SoT / DA
Elemental Arrow: BL
Vault: Tumble (or SmokeScreen: Lingering Fog if you insist)
Shadow Power: Gloom
Companion: Bat
Preparation: Focused Mind (for <40 disc) or Backup Plan (for >=40 disc)

Passives: Steady Aim, Archery, Tactical Advantage (when your DPS is at a more comfortable level, drop Steady Aim for Vengeance OR Night Stalker)

I'm not saying this is a must but it'll smooth out farming quite a little, of course that'll depend on your playing style. But this should generally fit most of the DH's

As for Equipment / itemisation wise;

Can't really help much there as a total revamp will cost a lot. But a general tip is start from equipments that give you MORE-DPS-per-COST ratio (e.g. 10m for +12k DPS w/o SS; vs 5m for +9k DPS w/o SS. The 5m is a better choice of upgrading; UNLESS the 10m is a cheap cheap cheap deal). Like I mentioned previously, start with amulet as it'll give the most dps-per-cost in your current setup, IMO.

And finally, like 2890 said - you can refer to my profile for itemisation ideas too, if you prefer moving towards a more tanky build (basically minimum kiting and face-tank most packs, and even better when combined with defensive skills like Guardian Turret + Numbling Traps.)

Good to see that you're doing well. Just a heads up, as I'm not sure if you read it wrongly / you prefer that skill.

What I meant was the Elemental Arrow with the rune "Ball Lightning" instead of Lightning Bolts, for larger AoE and number of hits (to proc Night Stalker).

Anyway, you're definitely on the right track on your gears and you'll just need more fund and slowly climb up the stairs, good luck with that!