Dueling DPS and map control.
Improved attacks and sustained damage
Attacking a champion 3 times will expose them, dealing bonus damage and causing them to take more damage from all sources for 6 seconds.
Takedowns restore health and grant bonus gold.
Takedowns on enemies grant permanent Attack Speed.
Deal 7% more damage to low health champions. Gain AD/AP after kills or assists.
9% attack speed, 10 ability power or 6 attack damage
Deals bonus true damage to enemies with impaired movement or actions.
Unique champion takedowns grant permanent out of combat MS.
Rek'sai's heavily auto-attack based damage pattern and ability to auto-reset with [Q] makes her a great user of Press the Attack.
Proccing the exposure damage early in a gank will empower you and your laner's damage for a much faster and easier kill.
Triumph allows you to dive deep into the backline with an [R] and get out safely if you execute them, thanks to the massive heal from Triumph.
More Attack Speed on Rek'Sai mean a faster Press the Attack proc and a much faster/healthier jungle clear.
Coup De Grace is a well-rounded reliable damage rune in this slot and synergizes insanely well with the execution of Rek'Sai's [R].
Cheap Shot allows you to burst down and duel the enemy jungler after knocking them up with [W].
Relentless Hunter is excellent for traversing the map for controlling objective and getting to skirmishes.
Patch 8.10 saw a buff to Phase Rush and jungle duels for scuttle making Xin a powerhouse.