Just spent a few hours testing Boost:
Monk Main:
Your current attack delay is tripled, with a minimum of your weapon's original delay, and reset. When your delay is up, you make one attack, which has 100% accuracy and cannot multi-attack.
Boost multiplies the damage of your next physical hit by 820/256+STR/400, and multiplies TP gain (after all modifiers) by 400%.
Monk Sub:
Your current attack delay is tripled, with a minimum of your weapon's original delay, and reset. When your delay is up, you make one attack, which has 100% accuracy and cannot multi-attack.
Boost multiplies the damage of your next physical hit by 444/256+STR/400, and multiplies TP gain (after all modifiers) by 200%. Sneak Attack's bonus from DEX and Trick Attack's bonus from AGI are applied after Boost.
I forgot to test if Boost still raises attack, and won't be testing how Boost+ gear affects the damage and TP gain multipliers.
XI Wiki





