Lazs. Your Math
is porked. I don't see how you arrive at those figures. I use the Stats page. As you can see for tour 32 (partial screenshot attached) it is 328k, 98d. Stats for tours 31 and 30 are 360k/109d and 281k/88d respectively. Add 'em up and divide as you did, and I get 969/295 = 3.28 kills per death plus a few more decimals which I am prepared to discount. To get this page, go to stats, enter my name (penultimate character = 1 (one) not L) and click on both Kills In and Died In. That is the only way I view my stats as it provides me with what I need to know.
The P47D25 stats are shown here for the last tour, and show my k/d as 33/2, or 16½/1 if you prefer.
Assuming that HTC is not lying to me, what makes you think I don't know the first thing about the arena? Maybe I just know the second, third and fourth things about the arena? LOL! Come to think of it, what IS the first thing about the arena? Please enlighten me.

Anyway, just to provide a respite from the bickering (which I hope we will resume right after this) I had an LA5 all over me like a cheap suit this afternoon. I was low in P47D25. The damn LA5 caught me off guard. I tried to split S and run, and although that opened up separation at first, he caught right back up to me again. He was too close for me to convert the engagement into an HO, which I would almost certainly have won. Well, 80% certain.

The last card up my sleeve was to barrel roll the P47, remembering what you said about it being easy to force an LAx overshoot. (It was you, wasn't it?) It worked. He managed to ping my engine out on the way past, but I gave him eight barrels at 400 yards, and he went down smoking. After I got the kill credit, I ditched successfully.
Now here's that stats page -