Akali gotta rush tank?

Akali is listed as an assassin however above platinum elo you better be planing to build a GA, Spirit visage, or sunfire cape if you plan on being able to do any dmg at all. I propose a simple solution to solve the issues with see with akalis assassination techniques: there should be a very short invulnerability debuff given to akali when she enters her shroud. The length should be based around how many people (enemies) are around the shroud when she drops it. The debuff of coarse would only persist either to the end of the duration, or until she makes an attack (revealing herself), or until she exits the shroud. Let me explain my reasoning behind this. Assassins were reworked around the idea that people hated being deleted by them, and so assassins can do lots of dmg but normally not enough to 1 shot somebody, and so once they have hit all of their cooldowns, the assassin needs a way to get out of the fight, for khazix its a dash on his e or invisibility with ultimate, Fizz gets dmg invulnerability on his e, kata gets this crazy resetting jump, rengar gets cc immunity, talon can hop over the nearest piece of terrain.. ect. THE PROBLEM with akali is that her escape is her shroud but when you are surronded by enemy combatants they can just through down there skillshots at the shroud and reliably kill you even though they cant see you they can see the small area that you are withen. the short dmg immunity would allow akali to build like an assassin and be able to reliably not get 1 shot for playing to her kit.