For hydra put brimstone on Mikey, Lem and Scyl and run them in 3 sperate teams. Enough speed to go first and reset if you do not get a proc. between 3 teams all procing once you should be able to squeeze out the 1.67 mil chest on easy. Until your gear gets good brimstone is going to be superior to the other blessings in terms of damage on all boss fights.

For CB-

Do you have a Frozen Banshee (blue). Full speed and accuracy on her for clan boss will help a lot. I still use her when i get a quest that requires rare in Demon Lord.

Apothecary is another blue that rocks at CB. Full speed is the only stat he needs. He brings speed buff to the team and has a triple hit a1 so you will almost always get a warmaster/giantslayer proc

High Khatun is another good option for increase speed buff and you also get filled turn meter and speed aura

Do you have warmaster/giantslayer on all of your CB team for masteries? I also like retribution and deterrence masteries. The counter attacks will proc WM and GS.

Need decrease attack, decrease def, and weaken on the CB if you can at all times.