Rattosh is interesting and might be a good way to make this work with a set other than Blood Knight. The devotion tree will have to change completely because I have to stretch to get that point in Old God.
Edit: OK, I retooled this as a Vit PS build and completely redid the devotions to make sure I had enough energy regen to support it. By changing around some components/augments and incorporating two copies of Signet of the Damned, I was able to overcap resists without any devotion points… so that allowed me some leeway to take a different path. I included Wendigo, Kraken, Rattosh the Veilwarden, and also managed to squeeze in Scales of Ulcama by taking some unusual devotion choices along the way. I had to give up the point in Old God to do so, but along the way picked up some really nice defensive bonuses. The build runs with almost 23K HP!
However, OA and DA seem to be on the low side and armor took a big hit.
Re-edit: from what people have tried before, seems like energy gen is the major issue here, and I don’t know if I’ve really solved it. Energy drain should help somewhat but I have no idea if it will be enough. Anyone tried Rotgheist?