I would say as any good lawyer would. It depends! Some of the nems are sand anemones and some are rock. You should not have a problem with nems that occupy diferent parts of the tank, but then again it depends. BTA's are known to wander. I have 5 in my 60gallon. 4 never move one like to move. If your nems stay put like most do then it is fine. If your nems wander you could have problems.
So in conclusion it depends, odds are eventually there may be a fight between 2 at some point. If that happens it could be bAAAAAD.
Mike