Sounds to me like Agent was flying so as to avoid being killed, vs having a chance to kill his opponent. I also enjoy fighting the high/safe BnZer from time to time. The key is to not just foil their attempt every time to where they get discouraged and leave, but instead to let them stay on your six. Usually after a very gentle turn, they won't break off. As they follow, the E states gradually even out. As they draw closer, start turning a bit tighter. If they're going faster, then they'll start blacking out before you do, so use that as a way to judge how much he can turn before blacking out. Just keep drawing him in, and when he gets to guns range, a normal reversal can be initiated. If the opponent breaks off, levelling your wings and climbing immediately is the fastest way to even out E states.