Time for some 50k mountains around that area.
i've flown 50k mountains in a lanc. it's a squeak, but a formation at 50k can be done, and 3 cookie cutters will level any hangar.
i'm not saying i support the practice, arados leveling hangers is an abomination, and i like using the aircraft.
all i can say is if they are leveling hangers, fight back. if you see a 234 on dar, face them head-on. they cant avoid well, and if they do, they lose their speed, thes rendering them vulnerable. i've tried low bombing runs on arados. i didnt use the ratos (i havent been on in a year, i was too much of a junkie) . i put them on the plane with all bombs, and take off on the largest field. then, once i am near the target, i hit ratos. this gives a speed boost to nearly 600mph, able to outrun lalas, 51's, even komets, because to effectively intercept, they have to go supersonic. and the boost stays, keeping the speed really high, and also keeps gas usage low. the faster the plane foes, the more time read on the e6b, and the more range. but, if you turn hard, to avoid, the plane os as nimble as a lanc or b17. if you shoot an engine, same thing happens. so if its an issue, retaliate.
and if this becomes a real issue, just pm me. maybe i can come back this summer.