Hopefully this will help. I understand sometimes the youtube guides can be a bit pacy.
Whoever understands this guide, should be the shot caller and help their team, as the dungeon can get out of hand if you don’t control it.
1 - Take the first add Nightfall Shadowmage - interrupt her Ensnaring Shadows.
2- Focus down Nightfall Ritualist’s - do not waste interrupts.
3- Head to Dawnbreaker - Here your tank must focus on Nightfall Commander’s - tank buster Tainted Slash.
4- You will once again see Shadowmage & ritualist. Do the same and take them down.
5- Mount up and head to the ship which ever side - does not matter.
6- Make sure to interrupt Abyssal Howl on both sides of the ship. Once the adds are down. Plant bomb.
6- Head to the other ship and do the same and plant the bomb.
7- Head to Dawnbreaker - interrupt as many times as possible Shadow Bolts.
8- Obsidian Blast - Shadow damage - in Mythic this turns into a beam and one shots you.
9 - At 50 & 5% Hp she casts Darkness comes - this is when you mount up. Pay attention to the debuff, eat at least 2 yellow balls to stay safe. She should die here.
10 - tank the rare at the church, if you dont know where it is. Check the map, it has a church like icon. Take the adds inside the church and tank it with the rare.
11- Right in front of the Church is your second rare. Tank him inside the house with the adds.
12- Now you should be able to kill Anub - your tank needs to pay attention to Terrifying slam. DPS needs to watch out for Dark Orb and dodge.
13 - Head to Dawnbreak - there will be an add tank it.
14 - Tank the spider - take Arathi bombs, this most people are completely forgetting. This is important you use it on the boss.
15- Rolling Acid debuff on player - watch which side it is and then move.
16- Here the boss will fly away now.
17 - Make sure to eat the yellow balls when you fly with him. Do not use speed boost and overwhelm yourself, you should be ok just following him
18- nuke him down.
Do this once or twice it becomes really easy after.