What's a good meta deck to build that would still be viable post rotation? I'm on a budget.

I basically only had Monored built. Now I still only have that but gimped haha. But that's good.

I have about 18 Rare and 11 Mythic WCs. (Arena) As such I would prefer to build something mono, and probably aggro (my preferred playstyle)

I am thinking Black Demons is good. White Tokens?

I know it's a bit early to be asking this, but what the heck.