Sorry for the delay in response. Having Celerity alone gives you the defense you need to firearms, without having to spend the Vitae, pg 130. It does say you get this benefit as well for Quicken Sight on pg 145, but I would imagine that was an error, since that benefit is "free" for simply having celerity.

Spending a Vitae heals 2 bashing or 1 lethal.