As long as the radius stays where its at imo the build feels very close to live now that the dust is settling on how to cover the losses.
Single point into Blood Oath with Tainteds and my demon actually regained health tanking a pack of p8 T3 Thorns Snow Drifters in Frozen River. My dude on the other hand is much more fragile. I don't think soft points affect the damage transfer from Blood Oath on PTR, so the 43% transfer its showing is still a lie.
blood oath isn't just a life effect on blood boil, its a synergy to boil for 20% fire damage per point, and fire is the main damage source on it
you could cut engorge and lose the physical damage on blood boil and abandon amp altogether and try to rely on 2x tainted + 1 consumed tainted and no bound demon at all, but I have a feeling that will be worse, its about 8.1k fire / 4.8k physical on my setup and against a lot of monsters its 2x both damage types, so you're losing about 1/3 of your blood boil dps by skipping engorge+amp in exchange for those 2x tainted