Wow really? She was just nerfed recently. I actually find it funny you are calling for another nerf. I completely disagree with you, that she needs another nerf. In case you cant remember they already nerfed her a3, the buffs used to last 3 turns and they nerfed it to 2.
No other nerfs are needed. There lots of champions that are way more powerful. You just need to figure out how to off set her. When i loose to a team with her normally its not because of her, its because of another champion.
The thing that I have to learn more is the synergy between champions that make up your arena team. If you are always loosing to a team with he, then you need to look at who is on your team.
Are you serious bro? They buffed serris with the recent AO with the preferece of AO. I also stay in platinum arena and is not possbile see a kazar, valkyrie, matyr going to be unusefull because serris distroy letteraly their effect. She is AN epic non a leggendery!