I've been using 5 Saber, 1 Fan, 4 NFR for about the last 6 months.

AF2+2 augmented pants add 1% Double Attack per Saber Dance level and having 6STR/Acc, 4% Haste, and 5% DA on my pants is pretty nice. To each their own, but Saber Dance is one of the strongest DD JAs in the game. Not meritting it at all is a waste.

By the way, /WAR's Double Attack trait does not stack with Saber Dance. You'll get 25% DA with AF2+2 augmented pants and Saber Dance with or without /WAR. Because of this, I am not sure what our ideal DD sub is. Berserk is still pretty nice, but offers nothing in many of the situations I use Dancer in (low defense enemies). SAM is a nice alternative. Maybe consider giving it a shot!