The Lifecycle..

[Serancha]

Boss/mobs need to hit the mages and or rogues in order to regen their mana while vb is active which rarely happens if warrior taunts well.

In what lifetime? Maybe back in season 2.

There are less than a dozen warriors that I know of in the game (more like half that) that excel at taunting, and even their rogues get hit frequently. Holding aggro against a team of well geared rogues is a near-impossibility. Add a mage with heal and sorry, warrior taunt becomes laughable. Not the players' fault, this - it's the way the classes are structured and the fail at warrior development by sts for the pve field.

Vengeful blood is good for so much, the mana regen is mostly useful in pvp, however the other benefits are great in pve.