I've always had a thing for the Invisible Blade prestige class from Complete Warrior. You become able to feint in combat as a move action, then later as a free action. They nerfed it in the errata so you can only do it once per round, BUT there's a feat from Drow of the Underdark, Surprising Riposte, that allows for a full attack with Sneak Attack damage.
ALSO, iirc, feinting is normally limited to melee but with the feat you can do it at a range, just not on the first attack.
After which you get options like Master Thrower, also from Complete Warrior, because throwing multiple daggers is awesome. Bloodstorm Blade is even better, because enchanting a ton of weapon isn't awesome.
Finally, if it comes down to the Ring of Invisibility, save a bit more and grab a Ring of Blinking. 7 rounds of sneak attack is better.