Kadala is pure RNG. You can raise the cap on blood shards by clearing new GR levels.Torment (1, I didn't go any further) is a breeze for now (this is my gear atm), I completed a GR and got a Bane of the Powerful, as you said. Also, I looked into my Arcane power regen stuff and now I'm good, I probably just had a very poor combo of gear and abilities that would just eat into it.
As for Kadala, I had to buy some stuff from her because I noticed I reached the blood shards cap after not being able to collect the loot of a blood thief goblin, and all I got was really bad stuff. Is she affected by anything or is it just pure rng?
But yeah, you can add me to the clan, thanks.