Uh I've heard of a lot of people using a trench coat for a refrence for Maka's jacket.
I made some awesome chain scythes for my Black Star cosplay. I followed this tutorial, and put my own twists with the materials I had.
As for the boots, I didn't make them big, but I am going to this summer. I'm thinking about either putting in foam, or buying clown shoes and put them just in the front of the shoe.
Hope this helps