rogue gearing

[Videri]

I think you should go for strength and HP, and resists if you raid.

From the wiki on Dexterity:

This determines how often you crit with your weapons, how quickly you learn weapon and rogue skills, and how often a magic weapon will process its skill. This is a good skill to have for fighters, especially warriors, rangers, rogues and of only limited use for magic users.

You can probably max your weapon and rogue skills easily enough with any level of dex.

Do rogues get crits in this timeline? I don't even know. If so, that might be a reason to raise dex...but str should probably be a priority, since it will give you a more consistent increase in damage.