For Vampiric Arrow, it looks like the description was not updated; in the skill stats under Special, it says "100% chance to heal X vitality" (where X scales with character level).
There is an 'Avoid Opportunists' talent that allows avoiding attacks of opportunity.
Links are fine, though UBBCode is disabled for new user accounts, so they wouldn't be clickable initially (anti-spam measure, which is no longer relevant for you).
