The buff that spent 2 hours getting there did it safely behind his lines. That's why ya see 32k and 36k buffs heavily loaded. To take say a 110g2 up and guess at the guys target (and I've tried) is difficult to say the least. His time spent getting to target has nothing to do with the perk point cost of the 163 I took up to intercept him.
I spent the perks, and know how to fly it to get to alt with the buff, and even then I have to be able to shot it down without getting shot down. So ya 50 is more than enough for that ac.