I've encountered those lineups before. Those are both human players. AFAIK, bots neither use masteries nor Imitater. Here's a sample bot lineup:
I doubt if it's a hacker. Probably spammed the Modern Day piñatas. And since CSd is the PotW, it's getting a lot of bonus seeds for it. 🤓🤔
That's just my theory 👨🔬👩🔬
This combo scored just over 4M against me this week in Electric Peashooter BattleZ
Electric Peashooter L5
Gold Bloom L10
Shadow Shroom L7
Dusk Lobber L10
>4M !!! I have only seen a few score above 3M in my Jade League this week
It's where your resources (like gems) kept multiplying every time you open the game. It sounds fun at first but there's a possibility of profile corruption. And it ruins the game experience overall.
I chronicled my experience on it here (it's a very long read).