Well, you shouldn't worry about MAD. With 83 points I got Str:16, DEX:18, CON:16, INT:16,WIS:18 & CHA:18 with 2 points left over.
Classwise, go cloistered cleric to keep those skill points up. I'd suggest domain feats; Knowledge Trickery and Travel Devotion specifically.
When it comes to rogues, I usually go the skillmonkey, scout,trapfinder type, so I'll not be much help here.
I'd say as far as PrC goes, maybe reflavor the Temple Raider of Ollidamara (Complete Scoundrel or Adventurer?) or, if you can use Tome of Battle, the Ruby Knight Vindicator (also reflavored).