Starting from 1. To begin with the build was more of a hodgepodge of what i've seen from other builds and putting it all together with the powers catered more towards being in melee to get most of my PBAoEs and with Soothing Aura to help assuage the damage being taken. Not planning on running this character solo and more catered for group content
2. Soul storm as you've seen was just placed there because I wasn't really sure on what else I'd put there so I just slapped a Rech on it and called it a day. Since I didn't really see it fitting into my build... Or any of the remaining powers i just put in Grant Invis and put a LotG global recharge.
3. Conduit of Pain would just be a rez and although a set would be nice i don't think there's enough slots to go around and i've even removed one to place elsewhere
4. I was taking very large inspiration from how I saw other people slot dark powers so i thought that there was no reason to. But now i know a little bit more about how this all works i can see that may not have been the smartest move.
5. Like the first sentence from 4 it was largely ripped from another but after having a look at the build i'd rather have the %def increases over a reliable damage boost
It's nice to hear that although what i'd thought to be messy was actually ok at what it did. From this input i've made a few changes which are minor such as adding the ATO sets and removing Life Drain and Soul Bind entirely and focusing a bit more on AoE defence (it's 3% but i'll take it). Thanks heaps for the help and here's the updated build for those interested PainDark3.mbd