Gate of the Setting Sun Challenger

First gauntlet - kill little guys first and fast. Run to melee when they are on you. Range pull to make sure mobs are out of the smoke bombs. Stay behind the mobs but as close to the tank as possible so you can dps or heal through the smoke bomb when necessary.

Saboteur Kip'tilak - Boss explodes bombs at 70% (maybe 66) and 33% so be prepared. Do NOT get hit by bombs. Person with sabotage stand in corner and as soon as it hits, get out.

Add packs - stun, kite and root. Watch out for smoke bombs.

Pack after the gate that Raigonn stuns you at. Be prepared to blow all defensive cooldowns. Mark the windshapers and stunlock one and burn it down. Burn the other quickly. Keep the Rager stunned if possible.

Striker Gadok - everyone needs to have whatever defensive cooldowns available. Mark two platforms adjacent to each other and be prepared to move quickly from one platform to another as he does his strafing run. Burn first set of adds. Cc, stun, fear the second set but just burn boss here. Main feature here is Prey Time which will kill a dps in 3 sec. Healer use cds on dps and dps use whatever defensive cds as they can. The very first Prey Time will not show up on your dbm so you may want to preemptively use a short cd right before it hits.

When Striker Gadok dies, 2 run up and use cannons. 1 with speed boost take elevator down IMMEDIATELY and run up to the gong. Everyone will be transported to the gong.

Kill small guy first. Try to cc 1 rager in each pack.

Commander Rimok - We found that an aoe add tank worked best for us here but it probably wouldn't make us the gold time. Move the boss along the sides of the wall and move him out of the green. Pick up adds and have aoe tank kill them. Other dps should be moving along the center to keep up with the boss. Do NOT get out of range here. Make sure you move with but behind the tank so you do not get cleaved.

Raigonn - 2 melee dps go up. Ranged, tank and heals stay down. Dps on nose kill nose asap. Make sure you pull when people are positioned at the cannons and right after Raigonn charges the wall to maximize dps time. People on the ground - pick up large pack of adds and kite/kill fast. If they have the green arrow on their heads they will just about 1 shot you. Ranged get the 3 engulfers down immediately after the small pack to minimize the tornados. When the swarm bringer comes out, everyone including nose dps jump down and kill him. Make sure you stun him so his swarm cast does not go off. If it does, need to dps it down fast ranged. Get debuffs off before jumping back on the nose. Second small add pack just like the first. When nose dps are done, everyone clean up the small adds and switch to Raigonn. Kite when he focuses on you and you've got it!

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This was the first challenge mode we did and while we didn't make a medal, the above method was effective. We struggled most with the healing cooldowns on Striker and everyone also needs to be on the same page for Rimok. We also watched people run gold mode on youtube.

Shadow priest
Feral druid
Resto druid
Prot paladin
Windwalker monk (brewmaster for Rimok for excellent aoe tanking)