Hi everyone ! As I couldn’t find it on the web, I share my tips and my solution for Puzzle Strike’s Challenge #7 : Midori’s Dragon Form.
Tip 1
You don’t have to 
every turn.
Tip 2
The only aggressive bank chip is Dashing Strike and it’s a good idea to aim for it.
Detailed Solution
Keep Dragon Form on the whole run
Turn 1 : Secret Move 
, buy Dashing Strike
Turn 2 : One of Each Chip Damage Training Day to trade Ebb or Flow for a Combine, buy anything and then 
and Combine
Turn 3 : Combine and then 
Turn 4 : Combine and again then