Shifter idea for shad

So with recent changes to shad as a whole, the playerbase has been a bit devided.
There have been good changes made to the class as of recent, but also a very controversial one. The Shifter changes haven't been well recieved to say the least among some shad, we did get stance as replacement and gameplay wise this doens't really change as much in my opinion apart from using more potions. But as a lot of shads have pointed out the class lost one of it's core features and doesn't feel the same. What I prupose is a shifter that pleases both sides (passive shifter enjoyers and more active gameplay).

Shifter would become a passive again, with its avoid % lowerd, maybe to let's say 10 or 20%.
But every time you avoid an attack you gain a let's call it a ninja token, with every attack you avoid the tokens stack up (could stack up to let's say 5 stacks). When you have a ninja token your ninja ambush skill (which is useless right now anyway) can be activated. When you activate your ninja ambush you enter a ninja like mode where you grant youself a % of crit chance and damage which would be stackable with SE. depending on how much stacks you have, the longer the buff lasts. But when you activate ninja ambush, passive shifter will be deactivated, your total avoid would be halved and you gain stance. granting you more damage but making you more vulnerable. This leaves the player the choice to remain in the passive shifter stance and trade in damage, while the ninja mode offers a more active playstyle.
In turn you could change certain boss attacks so that they can't be avoided.

With this change both cleave and single target will get a damage boost, and can be used when grinding and bossing or you just don't interact with it and just enjoy your slightly nerfed passive shifter.

This probably is too complicated to properly implement in maplestory but I thought i'd share my idea anyway.

 

This could possibly be implemented for NL aswell but get rid of stance. The increase in crit damage and chance would bridge the gap between NL’s without SE as they can apply a mini SE themselves, making them less relaible on SE to deal their damage.