Full blown combat or display only?

[Marcus Mummius]

you can flatten them with the scuta then finish the targets off!

Indeed, if the charge doesn't have to much speed and the guys in the back don't push the front line forward too fast this would be feasable. I like the idea. But you will need a lot of extra pila if you want to do this display several times at events. Or you will need a smith who straightens out the bent ones at the event.