I'm not going to discount your advice of course, I am after all fairly new to the GW2 necro. However I think there is something going on here you aren't considering as evidenced by your focus on my DPS. I'm speculating on a build we can't test yet, for content nobody's played, driven by AI nobody's fought. There is a lot of assumptions being made on my part, and it is entirely possible that this build will turn out to be completely and utterly useless.
However there is one strength I think it has that every build on this forum -that I've seen- lacks; it is forward looking. While all the advice I've gotten from you, Brandon, Phenn, and so on has been decidedly trapped in the past. You are all judging this build based on its place in a meta that WILL change if for no other reason than the changes to defiance making control required for PvE content and probably WvW as well (I'd be very surprised if Keep Lords don't have break bars).
Yes this build could very well end up completely scrapped. However I still maintain that judging it based on its place in the current meta and not taking into account the known changes coming to Heart of Thorns, when the build will even be possible to make, is at best intellectually dishonest. Yes in the current meta this build is complete junk. But considering what we know about the impending meta I think control will have a much, much higher value than it currently does. Enough to justify a build that isn't based on damage. A mindset I know you lack because even though I have flat out side already I am NOT building for damage and that Deathly Chill is there as a convenience and NOT the core of the build you continue to assess it based on the assumed DPS scaling of that trait.
Let me be absolutely clear; this is NOT a damage build. DPS is of secondary concern at best. This build is intended to function within upcoming content wherein, by design, there is an inherent and undeniably greater incentive to focus on control, and wherein being able to rapidly apply multiple control effects to single and multiple targets is required to complete content. NOT the current "LOL zerker" and "stack on boss" brain-dead zerg meta.
Do not judge this build based on the current meta; it will not and is not intended to function within it. This build is a speculative response to a possible -and I'd argue likely- shift in the meta game brought about by significant known changes coming to core systems with the expansion.