I always did like getting some psionic levels (psion for preference) and an elvencraft deep crystal composite bow of the wintermoon (elvencraft from Races of the Wild, deep crystal from the Expanded Psionics Handbook or SRD, and bow of the wintermoon from the MIC).
Deep crystal allows you to spend 2 power points to deal an additional +2d6 points of damage per attack, elvencraft means that it acts as both a longbow and a quarterstaff (or a shortbow and a club, if you like), and the bow of the wintermoon adjusts automatically to your Strength rating.
There's a psionic power called strength of my enemy (it's in the SRD) that deals 1 point of Strength damage on a successful strike with your weapon, and grants you an enhancement bonus to your Strength equal to the number of points of Str damage you've dealt (though damage against multiple foes doesn't stack). Great with Rapid Shot and/or Greater Manyshot.
Add in a few items in the MIC which deal bonus damage (between +1d6 and +3d6) a few times per day, and you can do some really great single-strike damage, if you so choose. (It adds to the DC of the Daze feat too, as noted above.)