Tyrvaas, the broken executioner

This is an idea I had for a champion, not perfect so opinions are appreciated :3 I intended for it to be an adc but I feel the concept is too similar to jihn or jinx. After all this character is supposed to be an insane ciminal assassin deriving from piltover so there are similarity's to both aforementioned champions.

Anyway here's the kit:

Attack mode Q - increases crit chance and attack speed by 5% for 3 seconds. If a unit is killed in this time the effect stacks. Can stack up to 6 times.

W- passively gains movement speed, 3% per stack, 1 stack per unit killed, maximum 3 stacks.

Active- consumes all stacks to load rounds equal to the amount of stacks consumed. These guarantee his next shots to crit but at reduced damage. Briefly slowed until all shots are consumed. Reload time is halved for 3 seconds after the last shot from this ability is fired.

E- pulls out his rifle letting his next 3 shots have increased range. Each consecutive hit increases crit chance by 10% for 3 seconds which does stack with diminishing returns 10/5/3%. The shots are piercing but only stack if a champion is hit.

Defense mode Q- shoots 3 times backstepping after each shot. If a shot crits gain a shield for 3% of current health that does not decay until destroyed.

W- attack range decreased bit gains extra damage and a stun.

E- shoots exploding rounds at the target area creating a slow field in a triangular shape.

General P- only 3 shots may be fired before reloading. Reload speed is affected by movement speed reducing reload time by 0.3 seconds for every 75 movement speed.

Receives half as much benefit from crit chance from items however the unused stats get converted into attack speed.

Each time a crit occurs that is not part of an ability, gain focus decreasing attack speed by 25% but boosting crit chance by the same amount

R- toggle. Switch between attack mode and defense mode.

Attack mode gains 3 additional attack damage per 25 attack damage, movement speed is reduce by 3 per 100 movement speed

Defense mode gains 3 additional armor and magic resist per 10 of each respectively. Gains lifesteal equal to 25% of crit chance.