[Loveless]

Purely out of experience. I currently have a 49 Archer who went 25 SPR and then the rest went into DEX. I've had STR:END Archer before and it wasn't as good as the one I have now.

Furthermore, most whom I've partied with or have seen me solo has told me I kill pretty fast. With the SPR there's the obvious criticals being dished out and with added DEX I have enough Aim to hit mobs higher than myself without a scroll (aside from bosses but even then I see the 'Miss' go up only 2-3 times). The DEX goes up a good amount when you level adding to the Evasion and Aim... then on top of all that you also gain % increase in those stats when you add points. To make up for the HP I always wear highest level rings for END as well as bows with END on it.

STR I find is useless. You have the criticals to hit hard when it counts. Also, with this build I'd recommend using a crossbow for the increase in criticals and overall damage.

So I guess this is another option for you. Though I suggest that you go pure something rather than splitting it into 3 stats.

EDIT: I saw your post before mind so I'll tell you this, Archers will not do well AoE'ing. We have one AoE skill until level 51 which has a cooldown of 30 seconds. Even if you put points into cooldown, after you shoot that you'll still have to focus on one mob.