Intercepting high alt buffers is possible, but you need a lot of patience, you cant go in a buff from low or slow when the fight alt is near 30k.
Speed up, following the buff, as you get close, pull lightly the stick and climb equalling the buff speed, when you're over 3-4k to the buff, level, speed up, then dive, try to aim the tail, stay fast, then level BEFORE reaching the buff alt, stay fast, extend and climb again, for next pass, stay fast, do a 20-30° bank turns, and stay fast.
uhmm, maybe i forget to say: "Stay fast".
Yesterday i land gliding after a 3 buff killing strike, first was at 30k, second 26k, last 20k, i climb until 35k and i found the p47 still flyable at 400mph (never gone down 300k).
The setup for those attacks was really boring, took long time to reach and overclimb those buffs, but still possible.
So if you want to intercept stratobuffs, you need to have the same patience they had to climb that alt, and climb higher.
But if Pyro will give us the two beauties, the stratobuff problem will be solved.
Which beauties?
Me-262 and Ta-152, naturlich !!!!