Finally had time to try out mission 6 and I really like it. Probably my favorite so far. Can't help but being in awe of those Backfires when you get up close. And a true "Dance of the Vampires" moment when the missiles start flying. I think it has good potential for re-playability. Played it twice so far and definitely will again to try out different tactics. The range of the AS-4's poses a real challenge. Thanks for sharing it!
Experienced two minor quirks, in case you ever want to revise/update the mission:
In contrast to the previous missions, my wingman took a long time to start up the plane and didn't start taxiing until I was airborne. Not that he was of much use anyway, but at least a welcome distraction for the SAMs.
It seems like the "Solex" name for the AWACS isn't supported that well by DCS. The radio messages didn't read out the name, but only the number. So the radio chatter was a little repetitive ("Enfield 1-1, 1-1, BRA, ...").