Mysterious Avenger Archetype Question

[Mr Babadook]

Ok so looking through it I found this

Quote:

Greater Charmed Life (Ex)

At 4th level, the mysterious avenger gains three extra uses of charmed life. As an immediate action, she can expend one use of charmed life to gain a bonus to her AC equal to her Charisma modifier (minimum 1). She must choose to do this before the attack roll is made against her.

This ability replaces the bonus feat gained at 4th level.

Now it is obvious this is meant to be just for that attack. But it doesn't give a duration on the amount of time. Now even in the book it does not say this, I found this on the SRD.

Was this ever Errated or FAQed?

Because it looks like RAW might be kind of funny on this one.

Also

Quote:

Avenger's Target (Ex)

At 5th level, a mysterious avenger gains a +1 bonus on attack and damage rolls with light or one-handed piercing melee weapons and whips. Furthermore, a mysterious avenger can study an opponent she can see as a move action. The mysterious avenger then gains a +1 bonus on Bluff, Knowledge, Perception, Sense Motive, and Survival checks against that opponent, a +1 bonus on weapon attack and damage rolls against it, and a +1 bonus to DCs of any deeds used against that opponent. A mysterious avenger can maintain these bonuses against only one opponent at a time; these bonuses remain in effect until either the opponent is dead or the mysterious avenger studies a new target.

At 10th, 15th, and 20th levels, these mysterious avenger's bonuses against a studied target increase by 1. In addition, at each such interval, a mysterious avenger is able to maintain these bonuses against an additional studied target at the same time. A mysterious avenger can discard this connection to a studied target as a free action, allowing her to study another target in its place.

At 10th level, a mysterious avenger can study an opponent as a move or swift action.

This ability replaces swashbuckler weapon training.

Why does this sound like Slyaer's studied target? And why does it seem like you get a default +1 to hit and damage from it and if you take a move action you add another +1 to hit and damage... and these bonuses increase every five levels... so +8 to hit and damage by level 20 if you spend a turn studying your target?

[Aydin D'Ampfer]

Good catch on the duration of Greater Charmed Life. Had not seen that before. Obviously an oversight.

Avenger's Target is supposed to be a replacement to Swashbuckler Weapon Training, which is why it gets the flat +1 to hit and damage. And yes, it is a Swashbuckler Slayer-esque ability. And at 20th, you would get +6 vs each target, not +8, and can study as a swift, not the whole turn.