Have to take into account that crit also gives oath, at some point enough crit will get you oathed up 100% though. But 19% crit seems way low to me.

I'm at 45ish% at the moment. (Do you take into account the 5% crit from talent on lightning spells as well as Oath/ToW? :P I hope not, cuz your base crit would be 5% then. XD Sounds to me you're on 33%ish crit.