StreamOfTheSky
Adventurer
Plunging Shot seems interesting... although the character can not fly yet. No real need to I suppose, being able to shoot everything while remaining on the ground, well protected. Being able to fly on his own is on the list of things to do... I may have to fork over some extra cash if I come across Boots of Speed or Winged Boots. Two items I really want in the same slot means I'll have to pay for the fancy upgrade. Winged Boots of Speed are going to be costly..... But I don't want to make this about items.![]()
The winged boots are probably a good insurance policy to get anyways, the whole plunging shot idea was just a nice quick and easy method to increase your damage. Even easier is potions of Enlarge Person and Strongarm Bracers (latter from MIC and cost 6000 gp). Of course, since you already have your tricked out bow, you'd need the Sizing property to make it large and benefit from strongarm bracers.
I know haste helps you a lot, but boots of speed are pricy and take up a popular body slot. If at all possible, just rely on the arcanist for haste, it's only a level 3 spell. Also check out cheap items in the MIC. Some of them give extra attacks 1-3 times/day.
You probably want to stick it out as Fighter, and as a Wood Elf, you'd face an xp penalty sadly...but I do enjoy archers with a dip* in Whirling Frenzy Barbarian (and the extra rage feat). The extra attack with that variant does not specify melee.

*At least 1 level for frenzy, ideally 2 for Uncanny Dodge.