Dt dps feats

hello i have questions regarding dts dps. How does shadowed blade work exactly? does it proc automatically when you just hit stuff with random combos or you need to do something specific to proc it? and what will more points do? furthermore is ether reap any good damage wise mainly? so is it worth to have 3/5 or even 5/5 in it? also what about blighted soul? does investing more points there make any noticeable difference or not? moreover how does improved dread fury work and finally is consuming bulwhark worth 3/3?

Shadowed Blade adds 1 proc per minute to your physical hits. It only procs after you have used Shadow Hex, and as long as the mob is affected by at least 1 stack of Shadow Hex. Basically as long as you use Shadow Hex every 10 seconds this feat takes number of hits from 6 to 11 per minute. It does not stack Shadow Hex, nor refresh the timer of it.

Wondering the same. Is ether reap worth 5 points? How good is it? enough with only 1 point?