Another thread mentioned circles, so, just for yu(c)ks, here's something I thought was a good idea in 2007: http://i.imgur.com/24gByIN.png
Let's never go back to when before Transmogrification was a thing.
Consider moving your cast bar and things up, like so: http://i.imgur.com/Zny62cn.png
I also think that pixel font is pretty hard to read, though your mileage may vary. Marke Eigenbau is my favorite!