Fang and Claw's easy as long as everyone pays attention and if on voice calls out what orbs they're going for and has their CDs ready for that part while during towers and tethers phase for us we've gotten really bad geirskogul rng sometimes where for at least one or two people there isn't anywhere for them to dodge and you can't run across multiple lines if you weren't going right as they plopped down. It's something that can be overcome, obviously, but it's easy to just hesitate and then it's too late to dodge the geirskoguls or be far enough away from superjump
I just think final phase isn't that tough because everything's predetermined except for what angle every even set of orbs spawn at. Akh Morn also actually doesn't hit that hard in this fight. I mean, don't get me wrong, it's still a lot of damage, but it's spread among 8 people versus only 2 tanks and the only caveat is that there's more hits each Akh Morn, but the amount of healing required for each hit is lower and lower. The first one hits the most starting out at about 6800 HP and decreasing, second one starts even lower, etc. etc.
Dodging orbs is easy too, stack on tank for first set, bait roars, run to middle, wait for corner orbs to explode, everybody runs to their corners that they used during the towers and tethers phase to drop those roars and dodge the center bombs, then use gap closers to get back in after they've exploded and get ready for Akh Morn again, then everybody gets to blow their damage cooldowns after and go ham on the Hogg.
Then the even sets are also easy to dodge, move to last set of orbs that spawn, bait roars at the very edge, run to the absolute edge of the last set of orbs to spawn (where you won't get hit by the center orbs going off but can start running immediately) and run straight through Nidhogg and veer off to the right or left while exiting his targeting ring and you've successfully dodged Hot Tail and the orbs and now you're going into Akh Morn with no damage and you get to just DPS until it's time to stack on the tank again while the fight just loops