[skill]Way of the Warrior[/skill]
This gave me another idea... a possible interrupter build, taking advantage of this skill.
[skill]Needling Shot[/skill][skill]Keen Arrow[/skill][skill]Disrupting Accuracy[/skill][skill]Critical Eye[/skill][skill]Way of the Warrior[/skill][skill]Way of the Assassin[/skill][skill]Resurrection Signet[/skill]
And possibly [skill]way of perfection[/skill] in the last slot. Also considering substituting [skill]Savage Shot[/skill] or possibly even [skill]Disrupting shot[/skill] in Needling Arrow's place (I chose Needling because of the faster-than-normal activation time and relatively low recharge time).
12+1+3 Critical Strikes
10 Marksmanship
8+2 Shadow Arts
With a full Survivor's set, a Sup Vigor rune, a Sup Critical Strikes rune, a Maj Shadow Arts rune, and two runes of Vitae, I manage to bring my HP up to the default 480. A Bow of Enchanting, possibly Zealous (though I'm not sure how necessary that will be with the amount of criticals being inflicted), with a "Damage +15% while enchanted" inscription... I'm thinking this might have promise (unlike my boneheaded warrior build).
Also: No support for the GW:EN skill icons yet?

EDIT: Perhaps [skill]Called Shot[/skill] instead of Needling?