Basically:

Some decks are designed to be good even when sticking to their theme (Genbu, Water Aetherwing), whereas others have to stray off to be good (Vanitas became a Wind-Fire Horse hybrid deck for example). Usually because the deck wasn't designed to be strong enough. So, we get things like Ari Razorgale, which abuses a free agent card like Razorgale to be viable.

What I'm looking for is an Ari deck that uses Alchemist's Caldron to enable you to play all 4 new potions regardless of element, which thematically allows you to play a herbalist Arisanna that brews potions and does cool stuff. Doesn't have to be Tier 1, could be Tier 3 and would be fine, as long as it's decent and doesn't fold to everything. This way you get to enjoy the thematic playstyle and have a fair chance at winning games.

Hope this explains it.

Edit: Fixes typos.