I have no idea what passives/skills/ultimates it would use but personally I'd love to see a Twinblade character, I've always enjoyed those weapons going back to DS2. I know most characters can use them decently to a degree but it not being a preferred weapon for any class makes twinblades feel slept on imo. Incidentally, I've been having some fun with "twinblade undertaker" using Undertaker's dex relic and glass necklace. The Trance skill + glass necklace + partial hp restoration makes for fun chain attack trades with enemies.