High Sustain, High Mobility, High Damage
Recently, I've come to notice that certain "broken" champions possess a trifecta of high damage, high sustain, and high mobility.
As a model, let's look at Master Yi.
Master Yi's Q and R provide him with insane amounts of mobility, with his R giving him boosted movement speed and immunity to slows, while his Q makes him completely invulnerable, unavoidable, and undetectable. This is his high mobility.
Yi's high sustain is provided by his W, which allows him to heal--in the middle of battle, mind you--a decent amount of health, all while protected by a shield. This, paired with life steal items, ocean drakes, etc. etc. make him very difficult to deal with. This is his high sustain.
Yi's high damage is rooted in his personal kit. His passive and his E both lend themselves to buffing up Yi's attack damage. These elements paired with attack speed boosting that comes from his R allow him to deal incredible amounts of damage. In addition to this, his Q's damage scales along with his attack damage stat. This is his high damage.
Other champions that might fall under this "trifecta" umbrella would be Tryndamere, Warwick (though, to a lesser extent), Jax, and Olaf.
What are y'all's opinions on champions like this?