If you take slayer's feint as a feat and purchase the deceptive weapon quality, does the bonus to your bluff check improve your roll even though you are using your acrobatics to make it?
The description on Deceptive specifies a bonus to bluff not to feint. So, it does not boost your acrobatics roll to feint. You would however still get the ability to feint as an immediate action on a successful critical hit.
And so with a keen sword the cost for a +1 upgrade is still probably worth it. Thanks.