may i have permission to model this into 3d models and post a picture of the finished 3d model on my blog and on deviant art. I will post a link here and note you as the creator of the original design.
Hard-edge reminds me of the buster sword in a good way. Vigilante is nice overall. I like the shape of oblige's blade.
To me though, ice prism and diamond sword seem like they shouldn't be made of actual metal and be made of their respective materials. So the diamond blade could have a really rough and serrated edge, like it's just big hunks of diamond crystal and the rest is smooth and flat. And ice prism could be just that, something akin to one of those long thin prisms with the pokey bit at the top attached to a hilt. Sure it'd work more like a club than sword but it'd get the job done.