Here sharing with you my new record & guide on doing 73.5 million damage to Hydra Brutal with a team including a rare Pain Keeper. This is an improvement over the previous Team which I posted 26th of Aug: Hydra Brutal 35M Damage with 5 star rare (1 picture guide) which you can refer to for various explanations, stats and compare with the latest result.
All the tips, strategy and explanations remain the same as in my previous post, so here just publishing the new result.
This is a large image where I added all the information, so if it looks small for you click on the picture to enlarge it and see clearly.
Hope my RAID blog post was useful to you - best of luck with breaking your Hydra records.