Kensa Luna :)
Rain is really effective at breaking armors and it gets rain pretty fast.
Then fizzy is also super strong at breaking armors cause all it takes is one of the 3 pops from fizzy to break armor. This is even stronger when you run double fizzy builds.
Finally, you can combo double fizzy + rain + double fizzy for maximum pressure and armor breaks.
Also, changing your playstyle while the enemy has armor is also a strong idea. Don't go in when they have armor and just throw bombs to break their armor. When they're armor is broken/ gone, then you can push back in and play normally.
It's all about respecting the armor