Well I really only use Flash for large pulls (or dungeon pulls). And the larger the pull I make, the more flashes I make before I start the Fast Blade rotation.

It was just difficult to explain because I only have 1500 characters to do so. My rotation is similar to:

Single Target:
Fight or Flight -> Shield Lob -> Spirit's Within -> Circle of Scorn -> 1,2,3 combo.

Multiple:
Shield Lob -> Flash -> Fast Blade -> Flash -> Flash -> Savage Blade -> Flash -> Rage of Halone, with flashing less as the fight moves on.