SD found a superb answer for one of NRs problems

[Nemesis]

I think a good point to note is the younger and weaker and in "some" cases female members of a group would now have the chance to offer mid range defence as they are very easy to pull.

Then you have the group training, this again would serve that well.

Last of all and as has been said mess about with the arrow and head and you can turn this is to something to worry about.