Kill Sedna

This is a thread for pro players to add semi-detalied guides on how to kill a sedna, because im tired of noobs rage-quitting because they think sedna is cheap or they are too stupid to actually change the build to counter sedna.

, i know the first paragraph sounds rage driven, , just trying to set the mood, lets help our little newb friends and tell them how to kill Sednas and QoTs.