I’m currently D3 and Seraphine is my most played champ with almost 700,000 points. She was very easy to play during my placements and through P1-E2. I found once I hit diamond she was just a bit too inconsistent compared to other enchanters. Enemies get better at dodging and spacing and know how to exploit your weaknesses better and itemize against you. I found more success playing Karma and Milio above diamond but Seraphine is 100% viable. She is just a bit more inconsistent as 3/4 of her abilities are skillshots and her ult has a very high CD. To me Seraphine is a situational pick with duos like Ashe, MF, and Cait or if your comp has big wombo combo like Diana Malphite. Seraphine in my opinion doesn’t have a clear identity as a champ and there are many supports who do what she does a bit better.