Riven with a Doran's blade can deal 546 damage in 4 autoattacks + 3 Q casts level 1 without factoring executioner in.
9/21 Renekton with a Doran's shield can deal 500 or 426 (not empowered) damage in the same time with 4 autoattacks + E.
Add in differences in HP regen, armor, -40 block for Renekton, -24/28/might be even lower block for Riven, different damage from minions.
Both abilities have same cooldown, by the time it goes off Renekton is bound to have 50 fury up and bursts Riven in auto + reset from E.
Even if something as stupid as this trade happened, Riven is not supposed to win and it only goes worse for her later in lane.
Riven winning level 2 is a way too bold claim and level 3 is not supposed to happen.
9/21 Renekton with a Doran's shield can deal 500 or 426 (not empowered) damage in the same time with 4 autoattacks + E.
Add in differences in HP regen, armor, -40 block for Renekton, -24/28/might be even lower block for Riven, different damage from minions.
Both abilities have same cooldown, by the time it goes off Renekton is bound to have 50 fury up and bursts Riven in auto + reset from E.
Even if something as stupid as this trade happened, Riven is not supposed to win and it only goes worse for her later in lane.
Riven winning level 2 is a way too bold claim and level 3 is not supposed to happen.