Hi,
I wanted to recommend something about the advance training, well... is not really advanced, is more for new comers to learn the basics of the games.
If you have 5* equipment you barely can see what you can do with it, 1 hit and those shufflebot are done.
What about some Mecha Knights with a bigger area?
Hint: There's a search function. Use it before posting a thread with a suggestion that's already been brought up.