My StamBlade is rocking the NM/Agility/Skoria. DW/Bow
Surprise attack is still the most used Skill. It's easy to weave or ani cancel. Start fights with a buff/endless hail/poison injection/swap bar/heavy/SA/block/LA/SA
The buffs and skills you use in order drastically affect your overall DPS.
I'd put at least 1 molag kena piece on with hundings rage. High weapon damage with a good weapon crit is what you need. Put weapon damage kuta glyphs on your jewelery and maybe change your mundus to add more damage. If you're going for a stealthy surprise attack build there is a set that increases damage of first hit out of sneak. Can't remember the name.