Dragon Soul issues.

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Originally Posted by waigl

Also Spine HC can be pulled without first 6 bosses down on hc and hc madness can be pulled without spine HC

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well if this reddit thread is anything to go by, you indeed do need to kill all bosses on heroic previous to the last boss

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Originally Posted by Challengerx

What? You can switch difficulties any time you want lol, even if u do first 6 normal you can switch hc and do rest on hc, thats how its supposed to be i bellive

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You actually cant. You need to kill all previous bosses on Heroic if u wanna do spine and madness on heroic also. Cant do some bosses on normal and then spine heroic.