I dont agree with 2 of the points you made. Blood rage is very good if you get hit alot, and with an aoe attack, you can clear the room with 1 casting (plus aoe) and more with more castings of it. Maybe increase the damage a bit, but overall i think its fine. The circle of protections are another one. They eventually have a reuse time of 60 seconds at lvl 8, and they last 60 seconds. There's not much more you can get it and you can use both at the same time too. Circle of protections go up in time by 5 seconds per lvl. Everything else sounds fair and i am for it.
Especially the blood sacrifice. That could be a great skill, but unfortunately way too much health over time.