Getting 100% crit rate for Paladins? (Blast).

Could anyone tell me what the easiest way is to get 100% Crit rate as a Paladin?
And I have been wondering if the base %crit chance stacks with the skills you're using.

I only want to achieve 100% crit while using blast so that would be 52% Crit rate +
5% from base crit. + 10% from SE + 5% from the gratias ring giving me a total of
72% crit rate?

If that's true I will only need 28% extra crit to get 100%. I know Lv A nebulites give uhm..
8% crit? but i'm probably going to wait till S rank comes out for a little more. But what else
could I do to achieve my goal?

Thanks for your help.