Akim, the Soaring Wind is straightforward to build around, and you can aim to flood the board in no time with cards like Young Pyromancer, Monastery Mentor, and Third Path Iconoclast
Pair Charmander with consistent Fire energy acceleration so you can evolve fast and hit harder
Wincons outside of typical black combo pieces, especially the Revel in Riches and Marionette Master pieces to take advantage of those Treasures, are a bit lacking in Mari's supported creature types
Simply giving a team of tokens evasion ends games, especially with cards like Intangible Virtue and Glorious Anthem to buff them
They all are incredibly similar and while they have their individual strengths and places I will fairly happily play any of these in place of another if I just want a bit of cheap card quality
Repartee Repartee is the Silverquill mechanic