For my group, tyger was easier than tinnin by a long shot, but that may be due to our setup or something. If you have 12 people who have any idea what they're doing, none of them are very difficult at all though.
Edit: Regarding ZNM rage, it seems to be about 45 minutes on T3 and caps their magic resistance + gives them ridiculous physical defense. I do not believe any offensive stats nor regain are changed, which seems counterproductive for a rage timer >_> The mobs are still killable, but you're down to DoT and ele sealed nukes for damage >.<
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