Improve MESMER class attributes?

I find Backfire is perfect for large teams. On 12vs12 it's rarely removed (or noticed) and causes great damage, mainly because of the battles' complexity (and disorganisation). On an 8vs8 and 4vs4 battles it rather acts as a shutdown skill (casters rarely cast through it).

I always use at least 8-10 FC, even in PvE.

Backfire will be called and removed in less than four-five seconds, if the opposing team is by any means half-brained.

That or it is interrupted