Stuck in Shield of Ice offline mode

I am, on Rank 21. I have cleared the Champions League in offline mode, now I am battling the Elite 4. I have defeated the first 2 trains of elite 4 but I am stuck with the 3rd trainer “shield  of ice”.

Any strategy or tips. I would appreciate any help. 

We need your monsters and a reminder of the enemy would be helpful :slight_smile: