If you have someone coming after you full of blind vengeance, and they just happen to have a combination of decent skill and moderate dumb luck, don't fragment your elite guard sending them after him (or her) one at a time. Aside from the obviously stupid angle of allowing him the chance for single combat with your best and brightest, it ends up just wasting time.

On the other side, don't be satisfied throwing a massive wave of lowballer flunkies at him (or her) and think that'll solve the issue, either. Competent people need to be appropriately dealt with.