STR with enough health is the way to go.
I tested this build against a couple of rogues with full doch who run the metrosexual high dex or hybrid build over Gelebron, Mord and Necro.
I pretty much get the kill 99% of the time, the only times I don't is when I'm AFK.
dex is only good for boosting skills and personally i found dex to be useless at higher than 750-1k all its good for is boosting skills and when u have 750-1k dex, cunning offers higher boost for me personally
same goes with str with my dark gele dagger and other pierce bonuses after 1.5k str feels redundant unless u have a significant increase- so raw damage/ dagger gear is better than stat gear but this all depends on ure total pierce damage, also the food that offer pierce damage scale with str making higher str worth it.
really a rogue should have 6k min hp builds, having any less does not increase your dps by a lot, making it useless and the more u die the less dps u do.