have no idea what an arch-nemesis means. however I do have experience with a couple of pilots that flew next to me. one razor, when I joined the pigs he would escort me to whatever my bombers would be going, he would say things like 2 on your six, 1 down, 2 down. after the second or third time I never bothered to look behind me if he was escorting me. another was waystin back in the day when I used to fly spit8, it would be like, semp there's 4 of them, go this way then next, soon it would be like ok we clear or monster when I would yell hey you got 3 on your 6, and I would dive in, next thing I know they would not be 3 anymore.
but lately the best flying I have ever seen was by 3x9 or 4x9 or x square, cant really rememer his name, i had e climb up to him, he avoided, then i lost e, he never fired a shot even when he could, he made a fool of myself in my pony, i finally ended up stalling all the way to the ground. I felt a bit humiliated and humble at the same time.
semp