The final boss is very dangerous to the tank’s health. Bring lots of AoE as mentioned before, since most of the instance is killing waves of mobs. You will need a good group composition for this, with a few healers to protect the tank and provide reflects, especially during the dwarven areas. To get it you need to complete the strike mission while the 4 challenge motes are active at same time, its fun for those who want something more challenging. This hidden achievement doesn’t count towards the meta achievement and it doesn’t give AP. Mission Challenge: Candidate for Khan-Ur – 0AP (Hidden) Make sure your damage classes don’t stray too far away from the tank or the supports have to choose between healing the tank or their team.
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This is probably the hardest challenge mote that you will need to complete, it adds a health bar to the tank, and once the tank dies, the strike mission fails and you have to start again, its easy to do though if you have supports in your team, as the tank can be healed by players.
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To earn this achivement you need to complete the strike mission with the Powerful Foes challenge mote active, which mostly gives boons to enemies. To earn this achievement you need to complete the strike mission with the Horde of Foes challenge mote active, which will spawn about triple the amount of enemies, still not much harder with a competent group and Epidemic Necros, Permeating Wrath Guardians, and Trap Rangers can solve that problem very easily. To earn this achievement you need to complete the strike mission with the Final Boss challenge mote active, it makes the Ancient Forgeman boss harder but its not much harder if you have a competent group.