Do not buff Omnistone. Remove that RNG bullshit.
Whatever you are planning to do with that useless keystone, Riot, do NOT try to make it viable.
Admit a mistake ONCE in your lifetime before waiting a whole year trying to balance it out, sucking out everyone's fun in the game. I can already imagine the fun and interactive experience of 'oh, he had Electrocute, damn, that's Aftershock and now he's proccing Dark Harvest on me, haha ouch!'. No.
I hated Klepto. I hated Shojin more than my ex-girlfriend. Stop doing the worst kinds of drugs in the balance team. Thank you.