As Mark and Paul smash each other to pieces in an hour and a half, Nick and I show how fragile 4s are. 
https://madlemmey.blogspot.com/2019/07/multiple-medieval-meg-maulings-at.html
Enjoy

 I used dismounted knights in 6s in a Free company army in a comp, they were like a magnet for anyone with a lance. Getting no factors at impact is brutal. 4s is like a gift to the enemy!

Yup, a shiny gift too!