Kai'sa needs to be gutted regardless of you wanting her to sell skins
Seriously she's broken. She is and will still be broken even if you get a lot of money for her skins. Nerf her. Being 0 to 100ed by second vayne is not okay. Stop giving ranged adc everything. seriously please stop. This game is imploding on itself because you keep giving to much damage to them and to champions that shouldn't be doing damage.
Melee champion=immobile mages>assassin's=bruisers>adc>tanks
It's not a hard formula. Melee champions need tons of damage because they are dying so fast from just getting to ranged champions, much less because they melt you. Immobile mages should have that same level of damage because they need to burst because they can't escape. Assassin and bruisers need about the same damage, where assassins have it for a short period then NEED TO ESCAPE OR DIE, NOT FIGHT EVERYONE. Bruisers need to keep the damage because they are easily kitted. Then adc's because they are behind the team and are the safest. Then tanks who don't need damage because they can't die.
Ranged adc are carries meant to carry behind a team, not on the front line 1v5ing.

(rhaast)
etc. in general. As for low damage, Take caityln for example. I've seen her take out a rhaast with a tanky build in 2 or 3 hits, auto attack hits not even kit. Darius nor rhaast could do that with their whole kit much less with aa. By the time they can actually reach you to kill you, they could have been kitted 2 or 3 times over. So to make up for everything i believe they need a good deal of damage, though Nasus atm could use a cd nerf.