Abuse these two broken champions for freelo and climbing. Every game that you play with or against these two unbalanced champions, you will see them fed every game.
Kayn is allowed to go red form and basically 1v5 the game. He is allowed to become the best juggernaut, assassin, drain tank in the game. Ultimate is invulnerability with 800 heal in the late game. Same healing as a Vlad hitting 5 people with ultimate.
Vi builds two items damage and proceeds to one shot whoever she feels like while having more tankiness than Darius or Garen does. It is 2019 and Vi ultimate still has 0 counterplay. It is 2019 and Vi is allowed to just walk into lane, hold Q and automatically win lane for her laner.