I'd avoid poison arrow and use stun arrow instead.
Splitting arrows is must have in the beginning for use against mobs, later on replace it with Exploding arrows.
Passive skills I'd certainly use : Evade, Regenerate and maybe Reflect.
I haven't played as a ranger myself yet, though, that's for my next playthrough... in my opinion warrior is the most boring class to play. Destroying entire groups of enemies from afar is much more fun instead of playing whack-a-mole.
