My scrapper scoundrel always steals threat when going:
Stealth--->Fle. Round--->Shoot First--->Rest of rotation
Even with guard on my character I always steal threat then have to aggro dump then use some basic attacks until the tank gets threat back. You can say what you want but I have played almost every class and the scrapper scoundrel still has the most burst capabilities.
^^^^^^ This is totally true.... I always pull threat off tanks and anyone else with this, and it hit's like a truck!