I made that real quick, but it might be fun.
Spiked Trap with a Golden Rune: A good way to deal quite a bit of damage quickly and surprisingly.
Entagled shot With an increase slow down to 9 seconds: Makes it so I do not have to recast it a lot and so I can get the 20% damage buff/get some range.
Sentry with 32% damage reduction shield: I can get some tinking damage out there, don't have to be close to the enemy to do that damage, and have a % damage reduction.
Cluster Arrow with life steal: Good way to have a pretty high damage AOE with life steal to boot.
Shadow power with hatred regain: Nom nom more aps and hatred.
Impale with a knockback and stun: Able to get out of situations and deals decent dps.
Not sure if you have enough high damage things in there. Might want to put impale or some other sort of high dps skill in there.
I can see the theme of your build: Survivability :3 Constantly regaining health can be quite annoying for your opponents.
Give a look into this: http://us.battle.net/d3/en/calculator/demon-hunter#cdUjYk!Wce!aacbcb
I tweaked it a bit, but tried to give it the attribute of survivability.
Grenades -> Fan of knifes: With the alabaster rune, you can get away from melees a lot easier and get some distance. Since it is a buff more so than an active, you do not have to worry about it all the time.
Smoke Screen to Obsidian Rune: I used this to give you a really quick way to regain hatred.
Vault to Alabaster Rune: A way to stun and knock back an enemy, while getting away.
Bola Shot -> Cluster arrow with golden rune: Still gives AOE and some nice damage and also gives you leech life.
Steady Aim -> Perfectionist: Might help out a bit more with the discipline. This is just more of an idea.
Hope that helps a bit :3