went to the testing range with the pz4H and took it out with 1 shot from about 50-60 impact angle at about 50-100 meters. but hey if using your brain is too much just use a 21cm rocket or a 250 kilo bomb 
the rocket is useless. only the bomb will work until people get to level 30
it’s useless if you miss, but if you get a direct impact then it will absolutely fuck up a jumbo
Thats not a good image, pls show me were you mean to hit to get a one shot.
its not easy. you only get 1 or 2 chances and the rocket’s drop is huge. it takes even more practice then bombs unlike american rockets which just need to know how to press R
the only easy to aim rockets is m8s as that is belly mounted not wing mounted like HVARs and 21cms also if you just kamikaze it then you can more easier get the rocket hit so make use of that as defense