Looking for extra help with some dungeon and raids

Hi this is my first time posting here after being a member and using the sub for a lot of already posted tips for things in D2. However my fire team and I are having some trouble with a couple of the dungeons and raid mainly Last Wish and Equilibrium. Just thought I'd reach out to the community to see if anyone would be able to give some advice to aid in getting through the dregen sere fight.

Thank you so much for being an amazing community and a wealth of knowledge in the D2 space especially for someone who is helping their brother in law get back into the game after he left the game before warmind came out.