I am prestige 9 (saying this because in seasonal normaly you play against the same prestige) and using a Lippy deck where i can win almost all the matches.
As usually i see a lot of NG in seasonal, and they are not enought to beat my deck (of course, sometimes i lose, speacially if i dont get some cards at the beginning)
may I see your decklist?
my last attempts to modify Lippy deck to make it more stable, not easily brick is remove the three trio, >> https://www.playgwent.com/en/decks/70bde90068bb1da8823d6e7e557ec8c3
however, it's not strong enough to beat NG especially when they steal Cerys and use it on Range row at R3 with Centerella copy Ursine Ritual ability.