This is first and foremost a ranged build
Hitting targets with your swallow souls/light weave will create a huge amount of pressure on targets..use your spectral bow at 5 stacks to burst low targets.
You have the option with concealed weapon and incapacitating strike(ult) to use these skills out of stealth for huge burst or in melee range if you a little umph to finish people off.
The escapist poison will heal you/keep you cc immune and give you Magicka back.. keep tri resto potions going at all times.
This build is ment for do damage and not for tanking hits . Pressuring your enemies is your best defense.
I generally light up my targets at range with stealth/swallow souls and light attacks. If I see the opportunity I come out of stealth and use either incap or concealed for a big burst.