Well, it can be done, but think, would one have the time or space to do all that in the midst of a big battle, with thousands of people in it? It worked fine in 1 on 1 but not in anything else, so I imagine spartacus got rid of the nets of his comrads. It is my assumption they would also drop the trident, as it is an expensive, not-so-manuverable yet more exciting version of the lance; and get a normal spear IMO. Still i'm not shure.
Anyway about your origin it's because of the title of 1 of your images said arqueiro, and i know some portugese by living in galicia.
PS is it only you making this mod? 'cause if it is that's very impressive to do all that by yourself in such a short time.