Medivac ulti nerf

[Flygplan]

Medivac is one of the few tanks who got an abillity which power increase over time and any such abillity risk to be very overpowered by the later parts of the game and for the very very cheap cost of this tank having such strong abillity such as making the enemies weapon not able to target tanks close to the medivac then its activated makes it incredible strong atleast at close range because it can protect your team from so much damage it make nerally all other abillites look like a joke, in later parts of the game it can save your team from maybe 20k damage if not much much much more which allow this tank to be played somewhat sucessfully even in very late game.
Not only doese this abillity protectet you from damage it also increase your max mana like the battery do which makes an allready so powerfull abillity that could be an ulti on the titan even stronger, it allows you to like use port and all your abillities including the ulti without spending any gold on batteries.
Think about this:
One of the cheapest tank you can get got maybe the strongest abillity in the game making it little point to upp from this tank for a long while because you don't really need nukes if you got an abillity like medivac and hp can be fixed by getting a gold hull or 2.

I think this abillity need some sort of nerf like halving its duration or take away the mana gain from it.