I
really need to get around to updating my builds for the new Enhancements, but have a look at my
Three Ring Circus thread. The main things to note since I originally posted those builds: you no longer need to be a dark monk to access Shadow Form from the Ninja PrE (so consider switching to light path for the buffs); you no longer need Dodge to take the Ninja PrE (though you might want it anyway for the extra Dodge bonus); and Toughness isn't the must-have it once was, since Turbine got rid of most of the Toughness enhs and all chars get extra HPs compared to pre-U19. For base stats, it's largely a question of which feat pre-req(s) you need to meet. Ideally you have both Overwhelming Crit (base STR 23) and Imp Sneak Atk (base DEX 21); if you wanted, say, epic Toughness as well, that req's CON 21. Obviously, that gonna strain your stats, esp. if playing, say, a first-lifer w/out tomes.
It's a trade-off: you lose 1D6 sneak atk, knockdown immunity from Acro PrE, one of your rog bonus feats, and some skill pts; and gain lvl 2 spells, Vengeful Hunter, Doublestrike action boost, and Fatal Harrier.