A Spectral Throw Variation(Could REALLY use input)

Hatred-Top priority aura. Freeze is always desirable. Damage is always desirable 'nuff said.
Haste- More attack speed=more projectiles out=more knockback from more hits, and if you're crit version it's more crits too for even more knockback and more freeze and EVEN MORE shocking. There is no downside. NONE.

Spectral Throw- The core of this damn thing. Use LMP/GMP with it or quit.
RT version recommended links
Added Fire Damage, Added Lightning, WED, Faster Attacks.
Added Fire Damage, Faster Attacks, Point Blank, Slower Projectiles
Added Fire Damage, Faster Attacks, Knockback, Stun
Added Fire Damage, Added Lightning, Added Cold, WED

Crit Version recommended links
Increased Critical Strikes(ICS), Knockback, Stun, Added Fire
ICS, Added Fire, WED, Added Cold
ICS, Slower Projectiles, Point Blank, Added Fire
ICS, Knockback, Stun, Faster Attacks
ICS, Added Fire, Faster Attacks, Increased Crit Multiplier

Usable as both crit/RT
Extreme GTFO- Knockback, Stun, Blind, Faster Attacks.
Healing- LGOH/Life Leech, Added Fire, WED, Blind/Knockback(non-crit) or ICS(crit)

Freeze Mine- GTFO move.
Leap Slam/Whirling Blades/Desynclone/Lightning Warp/etc.- Escape/travel. No other reason to have 'em in this build. I'd personally rock lightning warp or leap slam though.

Projectile Weakness- Make ST that much better. There isn't a real downside. It even gives MORE knockback. What isn't to love? The only thing is that ST pierces anyways, but oh well.
Critical Weakness- Only if you're the crit version and think this benefits you enough to warrant removal of Projectile Weakness. I just don't see that happening though.
Conductivity- This needs honorable mention in the case that you use Thunderfist. Shocking will be THAT much easier with this combo.

CwDT. You have a good amount of life, and not much innate mitigation, so this will go off pretty easily.-Enduring Cry(YAY MITIGATION)+Decoy+Molten Shell or Enduring Cry/Call+Decoy/Shell+Immortal Call/Cry(if cry goes off before call. If the priority works that way you can flip them too. I can't remember if it works that way or not, so feel free to confirm/say nope)

Heavy Strike/Double Strike- These may or may not do more single target DPS than ST in the end. This could use testing. It somewhat goes against the core ideas of the build, but if it works it works, and this is a very consistently useful gem. It also has its place in situations like the Dominus fight 2nd phase. If you have to hug the enemy anyways why not take huge damage with you? Ele hit can work too. It's just probably less useful(for the crit build it may actually be reasonably useful with Multistrike, but the knockback can make that depend.)

Spell Totem+Summon Skeletons- Amazing distraction. Drop a blind in there with 'em and it can hold off slower attacking enemies for way longer than it should.(KOLE AND BRUTUS I'M LOOKING AT YOU)

Whatever else you want. Those are the core and ones I'd recommend to support it. I'll suggest a couple for if you're crit build, or ones where I have no idea if it can even work with this build.(either form)

Cast on Critical Hit(Only really an option if you have a 6L)- Projectile Weakness/Critical Weakness(keep your curse up at all times. AT ALL TIMES! I still don't see how critical weakness has any real advantage though. I haven't done math on it, and until math is done I will leave it as an option), Decoy Totem, Ice Wall. Could use freeze mine and either decoy or ice wall. Could use Enduring Cry and Decoy/Ice Wall for defense as well. Arc+Ice Wall. Arc+Frost Nova(offensive). Decoy+Arc(more shock is never bad), Frost Nova+Frost Wall(more chill/freeze). Nova+Decoy(defensive. chill w/ possible freeze and taunt). Replace Blind, Knockback, and Elemental Proliferation(depends on ST link focus) if using. Ice wall is for the pushing back considering that ST pierces(Don't know how they interact yet. I haven't tested it, as I lack wall). Nova is for more chill/freeze. Arc is for more shock. Decoy is for grouping/saving your ass. The crit build needs more evaluation.

Blood Rage- It really all depends on the end DPS of this and the gtfo potential it has to be able to not die at low life. This is something that simply needs play-testing, and I don't have this build leveled yet in the first place, and wouldn't want to test Blood Rage until I've cleared through mercmerv and can farm her with this build(This will take a while. I haven't played all that long. One free weekend in closed beta and since the day before steam release.)

Smoke Mine- It may be good, it may be bad. It gets you in there, but are you sure you want to be there, and even more so do you really want to be in there? Are you sure you can escape? Do you have the anti-desync flask to make escaping more reasonable? The utility is very ambiguous with this build. I won't be testing this one myself.

Any other suggestions are more than welcome.