I way to somewhat fix Riven and make her actually balanced

Give her mana costs to all of her abilities.

That would really confuse her kit in regards to , dramatically shifting her build path.

Also - auto-attacks are manaless.

Each of Riven's level 1 Broken Wing slashes do less damage than her auto-attacks at level 1. Her rank 5 Broken Wing slashes do less damage than her auto-attacks assuming 225 Total AD, or only ~115 bonus AD off level 18 bases. All 3 rank 5 Broken Wing slashes do less damage than an IE crit with 385 total AD (~275 bonus), or less damage than an IE crit with the 10% crit damage mastery at 338 total AD (~228 bonus).

I'm not really seeing much reason to make her use mana in that light. Broken Wings is essentially a fancy AA steroid akin to the steroids of . All of which are also manaless. 2 have HP costs, but otherwise 0 resources spent.

Also - I'd like to see Fighters be relevant and light-fighters/melee carries be a choice rather than not. I'm not sure I'd call Riven OP more than she's one of the few champions of her given archetype that can actually stand up to the challenges of the current meta.

Kind of irritating seeing a bunch of mages like take over top-lane because the solid 1v1 class (fighters) don't have the tools or stats to be a 1v1 threat early in the face of minions and towers where range flips the dynamic around, and then fighter 1v1 strength becomes useless late once they have the items necessary because everyone starts grouping in 5v5 situations, favoring a naturally better 5v5 class like a mage.

is at least a respectable duelist and fighter throughout the entire game so she isn't a false choice like, say, where you've got the wrong power sinks and power spikes.

She doesn't need this, she just needs longer cooldowns.