Here sharing with you a manual Hydra Brutal team composition with which I did 87.11M damage - check it out and I hope it helps you with your success.
For 100% automatic Hydra runs please refer to my previous posts as I already provided that.
Remember, we all have different champions, you don’t need to spend money, work with champions you have - focus on correct strategy and farming good equipment.
This is a large picture, click on it to zoom-in if it is too small for you.