Jag skulle säga nej. En stridare kan inte göra attacker av möjligheter och hotar inte några rutor.
Total Defense You can defend yourself as a standard action. You get a +4 dodge bonus to your AC for 1 round. Your AC improves at the start of this action, so it helps you against any attacks of opportunity you incur during the round. You can’t combine total defense with fighting defensively or with the benefit of the Combat Expertise feat (since both of those require you to declare an attack or full attack). You can’t make attacks of opportunity while using total defense.
Flankering anger det specifikt:
When making a melee attack, you get a +2 flanking bonus if your opponent is threatened by a character or creature friendly to you on the opponent’s opposite border or opposite corner.
Kämparen måste vara hotande motståndaren, och samtidigt som man använder totalt försvar, är stridsmannen inte hotande.