I have been testing out different options before starting to assemble my Armada ships, and my first priority was to find out what I could add to set my fleets apart. The scale on the ships is fluid, to be charitable, which is usually an issue for me, but the the skewing of the models is consistently more pronounced at the bow and stern which leaves the center as a good focus for conversion...
I have not yet seen anyone post additions of scale crew, so taking advantage of the open decks of the Orc Smasher, I estimated the local scale to be 1/300 and put together several poses of crew for the cannons.
After tacking them on in several different arrangements, I think their height is close enough to work and 8-10 on the deck of the final ship will be the final plan with a brighter color scheme so they can stand out against the rest of the model. Next up will be figuring out how else I can integrate in more crew...