I'd better illustrate the probable damage for those who can't envision the unholy damage that NC can bring.
2 d6 take the lowest:
miss: 3/18
1 damage: 5/18
2 damage: 4/18
3 damage: 3/18
4 damage: 2/18
5 damage: 1/18
So on average you'll cause about 2 points of damage.
3 d6 take the lowest: (My maths is wrong here, it's roughly right but a correction would be greatly appreciated)
miss: 93/216 (96/216?)
1 damage: 60/216 10 123,124,125,126,134,135,136,145,146,156,
2 damage: 36/216 6 234,235,236,245,246,256
3 damage: 18/216 3 345,346,356
4 damage: 6/216 1 456
on average you'll cause about 1 point of damage.
Hopefully that made a little sense...
Cheers,
RayB