@Stat: Good job. I think this is what a good Str/Wis Paladin/Cleric should look like. It's a primary defender with healing abilities.
I see that you take a lot of healing powers with your utilities. Not necessarily a bad choice, but it depends on whether there is another leader in the party or not, and how suicidal your fellow party members are. If there is someone else who also provides healing, there may be other, better powers. I personally prefer buffing allies so the party needs less healing.
CovertOps : When you hybrid the two ... chainmail is free (or doesnt a paladin have chainmail on his list).. no feat required in context your analysis puts this something lost?
you'll have to keep up both a magic weapon AND a magic Holy Symbol/implement as you gain levels to keep your WIS based powers competitive and forget rider effects based on CHA for either class....
One more thought.
At the table you'll have an action shortage. Divine Challenge is a minor action to use and so is Healing Word so if you want to Mark, Heal, and Attack you won't be able to move.
you dont lose healers lore. as for 2/encounter, you can pick up another encounter heal as a multiclass feat. thats a lot cheaper than the armor feats.