Every attempt to land on a tank has resulted in the tank not dying in my experience. This is however a double edged sword, as it means you can plant a hellbomb on top of them.
Wait, you can plant hellbombs near any tank?
No no, the tanks don’t enable hellbomb drops, BUT, if they happen to be near an area that does you can deploy them on top of the tank. Since the initial impact doesn’t kill the tank usually.
Tanks are one of the few enemies NOT damaged by hellpods. They are effectively mobile terrain, you can mount sentries and supply drops to them. If you cover the red ‘eye’ on the mantlet (plate the cannon sticks out of) you actually blind them and they basically can not attack you save driving over you when they hear footsteps.
They take damage from them. Two hellpods landing on the turret will kill a tank
Fabricators and mushrooms are my personal favorite targets
I’m always calling in reinforcements, resupplies, and even the SOS beacon on top of fabricators. They re like free strategems!