This is event map is quite hard, I have no idea how to beat it atm, my main team with Debrobium just can't bruteforce through it and even worse, there's 2 paths so I need at least 2 strong teams to be able to full clear it.

Code:
i.imgur.com/Qy9YjAa.png
What is the best way for me to get stronger and enough to clear this map ?

And I want to unlock the last 5 rows of this event game, what do I need to do to be able to ?

Code:
i.imgur.com/ZmeBEgw.png