You know, Gabicho, an infantry wedge was very common, which is basically what this V tactic is with the commander adding an extra sentence of "face your shield slanting to your left or right."

It wouldn't be that hard, considering they also told their troops to "use your javelin like a spear" or "form the testudo" and such all the time.

And usually such elite soldiers as you listed formed the tip of the wedge anyhow. All the crappy guys followed at the base.

I like the "mini-siege weapon" idea. Of course I don't think they did it.