3 defensive option that are missing in the game

Flat damage reduction There is a rune that have that,, but only a rune is kinda lame , having a champion that can reduce small damages a lot more than big burst would be amazing to counter on hit effect.

Recoil damage use to have that but it got completely removed from the game. if you happen to work at riot and know the reason why , just tell me. this option allows player to force other player to be more cautious about how they want to attack. the new version is supposed to counter on hit and fast attack speed, but on hit build deal a lot more ap damage so it doesn't really works. Seeing someone kill himself on you due to him dealing too much damage with no penetration what so ever is great.

Damage reduction progressively diminishing kinda 's E somehow. having a spell/item/rune that counters short burst of damages, but not extended fight. We need that on a lot more than a support