Shockadin is a sub-optimal talent spec for a Paladin which focuses on a more offensive Holy gameplay. As of Patch 4.0.1 the spec has been made more solid with plenty of offensive talents being added to the Holy tree and quirks such as the removal of cooldown on Exorcism. Although not optimized for raiding, both healing and dps can be done fairly well in 5-man dungeons, even if PvP is where the spec truly shines on.