Outlaw is obviously great due to 30% + 30% for crimson vial. You then have it's easy cleave etc.
I'd have Sub as my go-to build though for general purpose PVE. Shadowstep ambush for your auto attack when in stealth. 3% health every 1sec when in stealth (shadow dance, stealth after vanish, stealth in general) so it seems a no brainer. Sub ST damage seems ridiculous also. So i'll more than likely go Sub/Outlaw for my play in Legion. Outlaw as my main PvE with Sub as my general PvE/off spec..
Though I am tempted to just roll with Sub as my first spec to get the Artifact weapons so I can rock PvE quicker.
does anyone else find assa extremely dull to play? Might just be me. I'm only casual anyway so it's not like I need to min-max sooo... Goblin Sub/Outlaw Rogue it'll be