another point, since charisma is now mostly for saves (of which you have plenty) and divine wrath duration, I think you can easily lower it a bit. I know theres a doppelganger CoT out there and we all know what kind of charisma bonus they get... more str seems the logical alternative.
oooh doppelganger cot, that sounds very interesting
yes, I think i would pick a black panther look for it.. ;-)
and about the dex points: perhaps start with slightly lower dex (14) then put the first increase into dex to qualify for ambidex. you can gain 2 strength that way. or does this conflict too much with your great smiting? in any case, yes dex might be a good idea too, if you feel the AB is high enough as is.