That's the problem. You'll fall behind the purist. If you go Str/Dex your Wis isn't going to be optimal meaning you'll miss out on high exploit modifiers. Don't pretend like it won't add up quickly. At 1st level you'll be straggling next to the purist (Fox's Cunning and Two-Fanged Strike).
Unfortunately, it doesn't matter what kind of ranged weapon you use - all the ranger powers are Dexterity-based for ranged attacks. "heavy thrown" only affects basic attacks, not powers.
I'm not sure that's a good rule, but it is the rule.
Can you cite the page # for this reference?
A TWF Dwarf won't even take a movement penalty.The melee ranger is a bit stat spread (though he can remedy that with Armor Proficiency: Chain, costs him 1 feat and 1 point of movement in exchange for the ability to dump dex, everyone forget this for some reason), but has good feat choices and acts as a secondary Defender for the party. That can't be underestimated.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.