I don't think strategical bombers can climb that high,

as missiles can climb higher? Also, the kind of strategical bombers you are talking about are US B52 and B2 type bombers? I assure you, B52 still needs figheter cover, and if PRC develop anti-stealth technologies, B2 would need too.

And you are right about amushes but the whole topic was about using lure and bait for amushes, and not about the scales. Thank you for proving my point that lure and bait ambushes could work even if it works on a local level :)