General

I kind of depends on your attack speed, range, and if you like to boss.
With a lower range I would go for: In order from best to worst - %Crit (Crits are very important for Shade), Att Speed (Hit Slightly faster, but not really important unless you do bossing), +Att ( Not the best but +30 att can be good with a low range), %Boss (some low range people boss too!), % Total Damage (Not really good for anyone, its kind of a fake increase in range)

With a medium range (100-500k) - About the same as above.

With a high range (500k-2m) - Att Speed > %Boss > %Crit

I personally managed to get some amazing luck on my inner ability and got:
20% Boss
13% Buff Duration
5% Item Drop Rate

Anyways, +1 attack speed, in my opinion, the best for a shade.
Crit rate is nice too, but after a mob/boss is below 50% its useless.
and then there's boss %

I personally am trying to get attack speed, I've already re-circulated boss%, crit rate, 50% buff duration, and %to ignore cool down trying to get it.
Passive booster, decent si, spirit max, green mpe pot, and inner ability att speed. Should be max speed for a shade. Which is totally <3

The skill states that the mob hit with the skill takes +50% damage while the separated soul of the mob receives -50% incoming damage. hitting both the body and the soul of the mob generally doing around twice the dps you would normally do.

So from what I take form the description is that the affected mob is received x1.5 damge while the split soul recieves x0.5 damage. Hitting both will result in an additive damage of x2 damage.

[quote=capslocker7]Soul Splitter defiantly does not reduce dmg by 50%[/quote]

[quote=biggamer]If that were the case, it'd be incredibly useless, especially on moving bosses. You do equal damage to both halves and it's definitely not 50%. In fact, I'm pretty sure it does the opposite. It makes you hit harder.[/quote]

I know the description says +50% on stationary monsters (soul won't split), and non-stationary will have a split soul that will take 50% less damage. So as long as you hit the soul and original, it should be +50% more damage.

Here you see me doing regular damage on the left, and on the right, 50% dmg with soul splitter
http://i.imgur.com/ga0uz0A.jpg

I'm pretty sure the soul split target takes normal damage, while the soul takes a reduced amount but that damage still goes to the main body.Anything else would be useless or overpowering. if it was the same % damage on the soul then you'd be doubling your dmg outpout, which is too much.

[quote=tenseiga1]
Soul Split actually makes you hit 50% weaker to the target. If you hit both the original body and soul body, it'll add back up to 100% of your normal damage.[/quote]
If that were the case, it'd be incredibly useless, especially on moving bosses. You do equal damage to both halves and it's definitely not 50%. In fact, I'm pretty sure it does the opposite. It makes you hit harder.

[quote=tenseiga1]Soul Split actually makes you hit 50% weaker to the target. If you hit both the original body and soul body, it'll add back up to 100% of your normal damage.[/quote]
Soul Splitter defiantly does not reduce dmg by 50%

[quote=closetoshady]Hi I was wondering what would be the best? I'm looking at 20% chance to ignore cooldown on skills cause then bind and soul split could be ignored pretty often (thereby hitting 18 hits/second) Is it also possible to get 1 good line with the 2nd being a good one too? (Say +1atk speed and 30%crit)[/quote]

Cooldown isn't as useful for Shade. If you're rich, roll for attack speed. If you're poor, keep whichever you land on first: att speed, critical, boss, w.att

It sounds like you're saying Soul Split + Claw gives you 18 hits/sec, and if that's what you're saying, you have a misinterpretation of the skill.
Soul Split actually makes you hit 50% weaker to the target. If you hit both the original body and soul body, it'll add back up to 100% of your normal damage.