Incite anger is defiantly worth it for some tank builds especially ones with intimidate as their top skill though it is quite expensive and doesn't suit all builds.
Also the best stunt for tanking in the game is Infuriate a stunt from Your Story's Stunt list pg 153 which gives not only the best agro bonus in the game but forces the aspects the enemy takes to be directed at the character with the stunt (so enemies can be compelled to attack the right target ).
Infuriate: Scaring people isn’t your forte; seriously
pissing them off, on the other hand, is right
up your alley. Gain +2 to any roll when deliberately
trying to get someone angry with you (a
social or mental attack or a maneuver with such
a goal). Any consequences (such as grudges) or
temporary aspects that result must name you as
the source and target of the anger.
This combined with Incite Anger (mental attack) is probably one of the most dangerous tanking build in the game. (Second behind the ever stupidly powerful enchanted items build).
