As far as Shockadin builds go, it's pretty basic. Up to Holy Guidance in the Holy tree and Sanc. Aura in the Ret tree. The few things I have done to make this more of a damage dealing build over a healing build (though I still can heal) is skip Sanctified Light all together and put points into Imp. SoR/JoR and purifying Power. The point I have in Imp. Lay on Hands is just a bridge, and could go in any of those three up there, though I figure if I'll be using sanc. aura most of the time without it being improved, sharing aura better with aura master would not be as important.
http://www.worldofwarcraft.com/info/classes/paladin/talents.html?0555301052010250105000000000000000000000000523500002030100000000