Hail of bombs imbalanced

[Prog]

explain me how to evade aiming rocket + rocket hail without porter

At max range heavy ulti needs around 2 seconds to hit and ~1.5 seconds at half range. Even if the target is right before you it takes about 0.8 seconds. When aimed straight to the target (which is nearly impossible, normaly you will allways aim at least 30-50u next to the target, on average it's even worse if you use rocket first as the target has more time to react) the target needs to move ~180-250u (becouse of unitsize) 90 degrees from the direction of the ultimate to get not hit at all. As you can see in your picture to get hit only once you need to move between ~1/4 to ~3/4 of the max (~250) (=~63-~188) to get only hit once. Air Tanks move ~290-310u per second without speed skilled. Stun durations with each lvl should be known by everyone. Just do the maths and you'll see that it's nearly impossible to hit twice if the target is not right in front of you and hitting once isn't so easy as well as in ideal (for heavy tank and the target) circumstances the target needs on average only ~0.4 seconds to escape from double hit area and ~0.75 seconds to escape from dmg area. Of course it's easier to hit ground tanks more often as they often can't move to the sides, but that goes for all aoe spells which have to be aimed manually (and is one of the reasons why ground tanks have more hp).

Note: All numbers are approximated but they should be near the real values.