I really like the concept of Runic Knight (sorry, Fencer sounds stupid. I'll refer to it as Knight). The idea of how it works and what it's meant to do is very interesting to me and sounds like a lot of fun... in concept.
In practice, unless the content they bring out is groundbreaking or they have untold plans of adjusting the enmity system, this game does not support tank classes. Hopefully they manage to make it useful while being fun to play, because it really sounds like my second BLU.