An AD champion with DODGE that Scales off of Crit

My idea is of a melee AD fighter or ranged AD caster type champion that has a kit centered around dodging auto-attacks with the chance scaling with crit. trading off a part of their crit damage for evasiveness. Along with that they'd have tenacity that scales with CD reduction.

So it'd be like with %100 crit They'd have 80% chance at dodge with 20% actual crit chance. And ALL of their CD reduction goes to tenacity. The CD's on their abilities are high and based on whether they are landed or not and lower only slightly with level.

Also one of their abilities would be an Ally (champ and minion) only dash that cleanses the champion and that ally of all CC and spell effects (at the cost of 20%max health for the champion) This would be the ability that made this champ a viable counter-ganker if not a jungler.

A balancing nightmare? Yes. RNG? Out the Ass. Fun? If you're lucky I guess. Annoying to lane against? My main intention

EDIT#1:

The thematic inspiration for such a champion was the idea of The Dancer. A hyper mobile and eye-popping character that deals sustained damage, is somewhat fragile but also untouchable in a way. They run circles around the enemy and have abilities that can benefit their team in prolonged group fight.