After playing that test game, I thought it would be a good idea to make the two squads of Sisters different colors, as I am doing with the Highland Guard squads.
I need to be able to distinguish them from each other in a scrum, or even when they are far apart, since they have some different elements in them.
Nothing radically different... just a switch in where the colors are placed. The biggest change was the white robes, which I will notice right away in the chaos of a game.
This Sister has a bit of a conversion... I gave her a power sword. Once again, based on the game that we played the other day. It's a very old Grey Knight sword.
Hopefully this will be able to do some kind of harm to space marines!