A good lvl 80 sin shouldent lose to an archer. I love archer at 75+, the damage is awsome but the ability to not minor heal makes you a warrior with 300 less DEF and 2.5k less HP. Styx are a wonderful thing, but when a sin has 6k mana it's only an obstical. With 1850ap I hit most people with 500-750 def 800-1350 and thats just not enough to kill a lvl 80 rogue. Sure, you can get rid of the defence uniques and pump up to 2.1k ap but good luck staying alive in a 1v1.
Archers just arn't ment for 1v1. If you 1v1 as an archer you need the level advantage.