If lees going to be buffed because hes at sub 50% wr, so should riven
(riven hit 47% wr this patch btw) Just saying.
Riven cant do anything against tabi rush or broken tanks, her only viable setup is abusing broken tank runes that are about to get nerfed.
Give her % total arpen somewhere on her kit so she isnt instantly negated by a cloth armor in lane.
How about adding a passive on riven ult that reads : Riven gains 10/20/30% arpen (scaling with ult rank).
Shes supposed to do damage, and this doesnt give her any more cc or utility, just damage and a chance to actually kill those broken tanks or tabi "squishy" ad carries.

buffs after he got gutted with the AP changes.