I realize the ninjas are great and Hayabusa is the most grounded one. I think Momiji and Hayate is the more vulnerable ones out of the Ninjas?
In the Top 16 Contenders in the DoA 6 WC, the person appearance/utilization list separates as so;
Rig - 2x (Highest Position: first Place)
Helena - 2x (Highest Position: second Place)
NiCO - 3x (Highest Position: second Place)
Tina - 1x (Highest Position: third Place)
Stage 4 - 1x (Highest Position: fourth Place)
Kasumi - 3x (Highest Position: fourth Place)
Bass - 1x (Highest Position: fifth Place)
Zack - 1x (Highest Position: fifth Place)
Christie - 2x
Kokoro - 1x
Hayabusa - 1x
Ayane - 1x
Brad Wong - 1x
Leifang - 1x
A few Places have more than one person there in light of the fact that the individual who completed in that position utilized more than one person to arrive.