Zyra

Since 7.2 her plants inherit her magic penetration, so they finally hurt enemies who stack magic resist. Her win rate is genuinely high, and through Diamond and Master the bans pile onto her. Rampant Growth gives nearby Thorn Spitters up to 50% bonus health and 50% attack speed.

Morgana

Even after 6.3e cut the cooldown refund on Tormented Shadow, she is banned in close to one game out of two in the upper ranks. Black Shield is the reason. For as long as it holds — up to five seconds — it blocks every disable aimed at one ally, so a team that opens fights with CC has to rethink the engage.

Malphite

Nothing has changed since 6.3c buffed his base AD and Ground Slam. He keeps his place because the job stays the same on a thin support budget. Ground Slam scales with 45% of his armor and cuts enemy attack speed by up to 50%.

Lux

Not a single patch has touched Lux since 6.3, and she still sits high in the role. It is not her win rate doing the work — it is how often she gets picked and how often she gets banned. Light Binding roots up to two enemies for 2 seconds, and Final Spark sweeps everything standing in a line.

Thresh

7.1h raised Death Sentence's damage and cut its rank 4 cooldown from 11 seconds to 9; 7.2d pulled the on-hit refund back from 3 seconds to 2. He is picked more and rated higher the further up the ranks you go, because hook and lantern calls come straight down to the player. Every soul he harvests adds 2 armor and 2 ability power for good.

Nautilus

The 7.1h nerf aimed at his jungle clear, and for support play it only thinned his shield. His win rate falls short of 50% in every bracket, yet he is picked constantly and almost never banned. Depth Charge is point-and-click, so it cannot be dodged, and it knocks up everyone on the way for up to 2 seconds of stun.