How to make a crit build work?

ive been playing around with volls protector on my duelist a bit and 3 power charges actually boost my crit chance from ~11% to ~19%, which is definetely a lot of dps increase with proper multipliers. however...right now this works (merciless) as my armor was shitty anyways, but i fear maps might be very hard without the defence boosts one can get from a proper armor. has anyone experience with running volls on a cleave dw duelist or smth similar?