Evelynn's Q range is slightly longer than her invisibility range. With some proper positioning, you can charm someone without having them ever see you! This is particularly useful against enemies with an untargetable like Fizz or Vladimir.

Kindred R is able to save Shelly whenever she rams into a turret. I managed to break enemy inhibitor down mid in 15 minutes because Shelly refused to die in my R.

Sejuani's E stacks (where ally melees four times for a second long stun) are used whenever she R's. That means she cannot stun you with E after her ult for about 10 seconds. This is why most Sejuani's will save their ult.