The build listed does have lots of ideas you can draw upon though. E.g. taking Persistent Spell later on is probably a good idea. It's in Tome and Blood and only +4 levels in 3.0; that makes it excellent, but not before level 15 (when you can Persist Divine Power). So again, quite a while from now
But for equipment, you're actually quite strong without equipment due to your buffing. From the list, there are few noteworthies you'll want to look at once you have money:
- Beads of Karma (from Strand of Prayer Beads; 3.5 version is a bit more expensive)
- Orange Prism Ioun Stone (3.5 item; 30k grants +1 to Caster Level)
- Bracers of Archery (3.0 version is much better tho; *frowntown*)
- Quiver of Ehlonna
- Heward's Handy Haversack
Interestingly, thanks to your magic, you'll fare just fine with just an ordinary Longbow. Though of course, magical abilities stacked on it help damage-wise.
And yeah, later on Str becomes less important, but I'd stick to the Wis > Str > Cha/Con > Dex now provided your stats are high enough to ensure that 13 Dex.