Again, if your party doesn't consist of a monk and you're doing 4 man content I would agree- but burning free MP for higher enmity at zero TP cost is golden during long boss fights at end game where every TP counts.
"Vengeance" is our second technical "bleed," while it doesn't apply a debuff to a specific target it applies a buff to you that impacts anything attacking you with a similar effect to a bleed with higher enmity/damage than fracture alone. Plus it isn't on GCD, which is always a bonus.
