[try_sincerely]

So morning star would be the weapon of choice there I suppose. Sword may win "by points" but with morning star you'd have a solid chance of actually neutralizing opponent.

[NoGravitas]

Historically, the weapon of choice for defeating plate armour was the pollaxe.

- https://en.wikipedia.org/wiki/Pollaxe - Fiore's azza: http://scholasaintgeorge.org/training_docs/Basic%20Poleaxe%2...

[vlehto]

Flanged mace should be pretty decent too: https://en.wikipedia.org/wiki/Mace_(weapon)#European_Middle_...