I finally beat this thing in week one of release with pugs and wanted to share some thoughts on the fight. Yes, the fight is tuned towards ilvl 620 and up. You can do it under if your team are pre-made or skilled but you will have harder time if you are doing it with lower ilvl and with pugs.
Here are some tips for each boss. (Note: I will not be going over the mechanics, you can read the guides, I am only giving tips on where the group might struggle the most)
Lord Roccor -
Do mechanics! Having dps leave boss and stomp adds (I know sounds dumb but if you greed the boss and too many big adds come, your tank isnt going to have a good time.) - After stomping adds, everyone must group up for heals this is important
Bael’Gar -
Tank never move boss and doesnt even need to hide. Just stack and face away entire time and have dps bring adds behind boss.
Lord Incendius -
This boss is usually the pug breaker, so either you need to have very strong dps or you need to bring some ccs. Warlock’s banish works best but hunter trap works too. When there are 3 or more adds, you want to CC the furthest away add. Also for soak, you want to have group soak the closest to boss. If your group have immunties they can soak the one in fire or during the push back. Your tank can also solo soak the puddle with big cds. Idea is to kill the boss before 5th add spawn, you really need to put a lots dps on the boss at the start.
Golem Lord Argelmach -
Is easier than incidious, if you can kill 3rd boss you can kill this one, dps check almost non-existant. Remember to pop a def when flame gloem ults.
The Seven -
Same as golem, focus on mechanic than DPS. Tank has a bigger responsbility in this fight.
General Angerforge -
Free loot, no tips.
Ambassador Flamelash -
Very important to save cds for portals, if everyone alive after 2nd portal you win the fight. DPS on boss is less relevant, make sure tanks always point adds. 2 min+ cds should be saved for every portal. Lust first portal, all cds 2nd portal. Dont miss soak and boss dies.
Emperor Dagran Thaurissan -
First phase is the hardest one, make sure lust and kill the girl first, so basically… on pull → dps moria → after purple cone combo → go kill adds → finish moria → boss → adds → boss. For the necrotic circle, have a ranged dps take it out and max ranged the boss, the purple cone will never hit them. Ranged dps that have necro should not have the debuff, since they cannot be healed, or you can pass the potato but I do not recommand passing it since it might go on someone who are not intended to get.