I've got an interesting one for you: http://www.wowhead.com/?talent=sZVhtI00dggatV0x0h
Reading has told me that Improved Judgement is actually unnecessary for a standard Protadin build due to the cycle of cooldowns. Or perhaps I mixed it up with Retribution. But if you really want full PoJ plus Spell Warding, the above gets it for you.
Regarding that, Buddha, I'm not sure how any math could result in a 3% spell miss being superior to a 4% spell damage reduction, unless you take into account the increased chance to resist debuffs like fear.