I like this fight’s layout, although mastering it might take a little practice. It took us a considerable amount of time to figure out exactly what combinations worked for us in the first phase. I’m still going to focus primarily on our feathery ranged dps role, though.
Trash is very easy. It’s two sets of two dark iron guys. Tank the two together, and the tanks need to switch targets back and forth until they’re dead. Single target dps them down. Do this twice, done.
When you walk in the door, there is an assortment of NPCs fighting a Jormungar in an arena-type event. Kill the Acolyte healer first, then the Captain, then the other NPCs, then finally the Jormungar. Honestly, I usually kill the healer, dot the captain, then Starfall + Hurricane. Once everything is dead, Thorim will start a dialogue. At this point, Phase 1 begins.
You will need to split your raid into two groups, one to play dodgeball-mini-boss-killing in the tunnel and the other to hold off adds in the arena. I can’t give you a magic formula for who needs to be where. I can tell you what works for us, and that should be a pretty good guideline.
The Arena Group‘s primarily going to focus on killing adds and staying alive in the arena. You’re there to distract Thorim with a good show while the tunnel group sneaks in from behind. We go melee-heavy in the arena because they’re better suited for it. There are lots of silences in the arena, making it inhospitable to casters, and enough moving around in the tunnel to make it difficult for melee to do any good there. Our typical arena group consists of two tanks, all the melee, a hunter or two, and 4-5 healers. If you find yourself in the arena (I have been put in there before, but not in a while), run if you get the all too obvious DBM skull on your head, and the kill order is always Evoker -> Champion -> Warbringer -> Commoner. Some groups AoE this part; we haven’t had luck with that yet. Keep this up until Phase 2.
The Tunnel Group is the one I’m usually in. We go wait by the gate to the left until Thorim engages, then someone pulls the lever and we run in. We generally have 1 tank, 1-2 healers, and all the caster dps. There is trash and two mini-bosses to plow through in order to rescue the arena group. The trash up to the first mini-boss is pretty simple; kill the Acolyte (Note to my mage friends: if it is an Acolyte, then its heal needs to be interrupted, kk?) first then the Guardians while playing Dodge the Fireball. The miniboss will raise one hand with fire and throw a fireball down that side of the tunnel. Watch his hand and move to the opposite side of tunnel-o-flame (we have someone call it on vent to prevent dumb wipes).
Kill the first miniboss while the whole group is stacked up on his butt a la Attumen & Midnight. As soon as the door opens, kill the Acolyte standing there and then let your tank run the spawning mobs up the stairs to stop the spawns. Kill the second Acolyte once you get to the top of the stairs and then kill the second miniboss. Run away from anyone who has a skull on their head as they become a stationary bomb that will hurt you (a lot). As soon as the second miniboss is down, kill the adds and head in past Thorim and into the arena (careful–if you manage to do this and engage Thorim in under 3 minutes, you enter Hard Mode).
After all of that mess in Phase 1, this should seem relatively easy. Clean up the adds left in the arena and start dpsing the boss. The biggest thing you need to watch for are Lightning Charges. You’ll see two streams of light traveling along the ground in a direction. Get away from them, because once he finishes charging the orb, it’s going to blow up at you in a pie-slice shaped AoE. You don’t want to be standing there when it happens. Other than that, I just stand wherever I stop and dps him until I have to move again.
It might take you a few tries to figure out how to divide your groups, but once you get it, you’ll be collecting the loot and moving onto Mimiron.