I saw that champs's skills cost are in mana or energy ... about katarina like an weak assassin without nothing , but what happens with Riven? Stunt+movement+tank scalled by ad?What is wrong with that champ? Can someone explain me why riot is not doing something about it?
67chrome2 votesI saw that champs's skills cost are in mana or energy
or fury, flow, heat, health, ferocity, nothing Riot's been playing around with different resource mechanics.
Concerning Riven though:
Auto-attacks are manaless.
Generally speaking, the play-pattern with manaless champions favors doing things very similar to auto-attacking. Garen's Spin to Win, Rumble's Flame Spitter, Vladimir's Tides of Blood, Akali's multi-face-dash mark-AA combo, Tryndamere and Aatrox's actual straight-up auto-attacks.
Riven's Broken Wing skill is essentially a %AS auto-attack steroid that moves her forwards a short distance and does AoE damage as well. At rank 1 and level 1, the 10+40% AD will do 50 damage when her AA is about 56. with 225 total AD at rank 5 it will do exactly 225 damage just like a normal auto-attack (but cannot crit), and any more AD it will do less than a typical AA.
Even with animation canceling, Riven's REWQQQR+Hydra combo is closer to the sustained direction than burst, at least within the scope of other pure-damage melee champions. Tryndamere can output the same damage come mid/late game in the same time frame with no burst and auto-attacks alone, where someone like 
or 
with heavier mana-costs can synchronize their entire kit's damage to strike within the same half-second. Almost the same frame.
Beyond burst - mana is also used to gate utility (
) or range (
), of which Riven essentially has neither. She can stun someone the duration of a latency spike at very close range and once every minute she can strike someone at range, but that's it.
HP shield, mini-stun, and move at 550 MS with immunity to slows are certainly solid - especially with moving at 550 while damaging foes, but as someone who essentially AA's all the time - it's not exactly meriting mana-costs more than Aatrox's mini-malphite ultimate or Tryndamere's AoE slow wall spin.
Also if Riven used mana: 
NERDSMASHER50011 votesnothing is wrong with her you're just a noob and bad
Ijustganksayhi1 votesnothing is wrong with her you're just a noob and bad
Why riven didn't have mana ? Is frustrating to be chased by riven,you can't excape,even you fight 1vs1,you have to destroy armor twice...because no mana or energy.
In late game you have to face huge damage aoe,low cd reduction,huge armor and huge ad because armor scaled by ad.
ModWulf Helhammer1 votesbecause some champions are made to spam spells, and as such, don't have a resource (examples being Katarina, Riven, Yasuo, Garen))
4ManVotedAgainst1 votesEveryone should just ban & boy-cott Riot-games from this very moment. Too much time-wasting due to the incompetence of their so-called Balance-Team & matching system.
Posui Gart1 votesShe is balanced with her relatively weak (damage-wise, and low range for dashes) spells. Good Riven players add autoattacks in their combos so they can actually trade. She is also weak against good teamplay(like any assassin). And manacosts are rarely a problem if you aren't mindlessly spamming spells. And Katarina is not a "weak assassin", if played correctly and if enemy team has no counters for her-she can wipe enemy team with little help