Ranged: Long range damage with roots and snares to keep your foes at bay.
Melee: Utilize stealth and positional attacks to quickly burst down your target.
Ranged: 2-Handed Bow
Melee: Dual-Wield Swords
Personally I like my ranged DPS so will be going that way, I also like my mobile characters and Ranged Shadow Warrior seems to be up there with the most agile.