[Brut]

Dex doesn't affect your hit chance methinks, it's just ATK stat.
Affects your rate of getting dual wields / double attacks off, and proc rate.

Iunno if procs are a good thing anyways, you don't want aggro and that's what most of them are going to do. Kunark era there aren't many amazing proc weapons you can get anyway, and most every proc toy am tried out on my rog (had 200ish dex) didn't really go off that consistently to make them worthwhile. Got that HS dooming snare sword with image of easymode snare fear kiting in mind, the proc went off like every 3rd mob at best.

So would personally say aim for cap Str, once 60 and potentially into raiding you can give up on it some since you should always be shaman buffed to hit the cap. You're not a tank so you wont get all that much hp from Sta; think some gear swapping dipped me rogue's stamina by 15 points or so recently, and all I lost from doing so was like 100hp.

Personal opinion: it doesn't really matter, get Str high up, then stack up MR gear!