That suggestion reflects your own personal preference. If I was to say something like that, the clans wouldn't be the same. Every individual has their own bias towards particular clans they like.
It's a bit like someone asking for help to improve their Roots/Pussycats deck and me suggesting they switch all 8 cards for mono Montana.
You're entitled to your opinion though.
If I was to go with mono Piranas... well I don't know really. Selma (or Lizbeth when available), Raeth, Ector, Taljion, Tyd, Morgane, and 2 of Hawkins/Amiral Coco/Tula. Thaozal's suggestion seems just as reasonable.