I use :
rare Balista (ias, damage)
Sigon gloves & helm (ias, leech, attack rating)
Twitchroe (ias)
rare amulet (skill, mana leech)
Goblin toe (12.5% crushing blow)
Goldwrap (ias)
rare ring (min, max, leech)
Manald heal (mana leech)
max Strafe, Freezing arrow [main skills]
max Cold arrow [synergy]
max Decoy
some Critical strike
1 point : Penetrate, Pierce, Valkyrie
As many dexterity points as you dare to invest.
Chaos sanctuary is not so slow... but very dangerous. Low life (around 300), low res (around -30) : a couple of hits sometimes mean death.
Hence the strategy : cast Decoy, shot from behind it. Valkyrie does not really kill, but her life gets boosted by Decoy, so she's another shelter.
Main attack is Freezeing arrow. Strafe is used to recover mana if needed (or against cold immuned targets of course).
Many people will tell you about Gothic bow. I prefer Balista for the ability to recover enough mana for casting continuously Freezing arrow.
Truth is you will never get close to other chars easiness...