It is difficult indeed.
I must say that i am not realy that good with this baby.
Keep up speed, yeah!
When going into turning fight, turn twice at the most, then disengage and go around for another run.
When i face a better turning opponent, let's say a N1K, you can try high or low jojo. Low jojo may be better, it keeps your energy better.
I have to add, that when you do this, it is better to be at some distance 800 meters or so.
When i am closer than this, the turn will still be too tight for you to turn the dora
Anyway, keeping your E is always good, remember that a dora is faster than a N1K.
Hope this helps,
JG5FaBi.