My understanding was 3.0 really made cleric archers badass, mostly with magic arrows and bows stacking their enhancement bonuses.
You could also Power Attack with light weapons, meaning you could TWF and do better with Power Attack than with a two-handed weapon.
A lot of the warrior-type PrCs were nicer back in 3.0, so they might be worth looking at.
I seem to remember Mage of the Arcane Order being a lot better in 3.0, allowing you to build a spell pool dept, and better yet, pump unused spell slots from one day into future potential for the next day!
Other than that, it's been a while since I've looked at my 3.0 books, so I don't have any other good ideas.