Since I was harrassed playing cassio sup before the game even started I decided to archive this build.

Masteries are chosen to increase damage and outscale the enemy team in the lategame. They also provide defense and together with the runes Casiso will be quite tanky.

This is a kiting lategame Cassipoeia support guide. Hitting enemy champions with your Q gives you stacks and gold. Slowing enemies with your W and your high damage potential to poisoned champions gives utility to your ADC.

Midgame, kiting with your Liandry's means high damage over time and if the enemy is slowed this damage will be doubled (crazy combo with W and/or your Rylai's). You will poke down the enemy team and let your ADC finish them off.

Being support cassio means hitting your Ult when/before your ADC engages, placing wards, slowing enemies (W, Rylai's, Frost Queen...), hitting poisoned enemies with E etc... you will get used to the playstyle very soon.

Lategame, Cassiopeia will have a crazy damage output with her E to poisoned champions so get a Rabadons if you are at full stacks.