I did a run with a full Con, Picture of Health and Warfare Warrior. By the final boss of act 1, she had roughly 700-800 flat health, 300 armor and 100 magical armor. Due to the nature of rage and The Sunderer, this walking fortress also hit harder than the rest of my party. It would oneshot armor on almost any target and didn't die a single time.
Warfare isn't strong because of the passive. It's strong because you can get 40% bonus health out of it and still do high damage.
