WOW Power Leveling: Most of the other archer skills are not effective in PvP
Stay out of LW and CZ until you hit level 60. At level 60, you:
Get the awesome skill Shadow Hunter (SH). SH always hits for 250% WOW Power Leveling damage unless you contact something in between, like another player or terrain, without SH you will miss a lot.
Most of the other archer skills (aside from SH and AS) are not effective in PvP. The DOT (damage-over-time) skills don't do much damage, esp compared to mage DOT skills, and they have a slow casting time.
Can do the master quest, the master quest will probably cost you an arm and a leg, but it's worth it. It boosts your attack permanently by about 6.75%. For me the attack boost was 85, which is like having +21 dex.
In addition, when your hit points are low, you'll automatically redball, which raises your resistances by 50
PvP Tactics: To rack kills, be selective about targets. I look for targets in this order:
1. Mages (weak defense, tend to get pounded by everyone)
2. Battle priests (weakest defense, but be careful or they'll duff you, and they hit harder and faster than mages)
3. Rogues
4. Non-battle priests
5. Warriors
Mages often have a warrior or two in front of them acting as meat shields so you may have to target mages manually.