I think there is a good point behind what Elfie said. I will usually fight these days, not just BnZ. I find that if I go above 10K it is normally an anomally. However, there are times where I'll engage one guy (say I'm in a tiffie) shoot him down, have a good head of speed, then have a spit come down on me about 1.0 out. I will extend in this situation, probably to the point where I can use my E to my advantage or he loses interest. Now, that may be a poor thing to do, but in that situation I can't seem to find ways to get back my advantage because as soon as I reverse, we are now in a turn fight and he should have me no problem.
I have been learning to keep my E better in those situations, but I'm still way far away from where I need to be..