You guys are awesome. Perfectly explained with a few fun extras. Thanks a bunch!

I've dug through the threads and I hate when someone throws up an already done thread but I couldn't find one so here we go. I've been trying to wrap my head around end game gear and raiding. So correct me if I'm wrong. Tier 1: Hard Modes & Regular Eternity Vault Tier 2: Hard Mode Eternity Vault & Regular Karagga Tier 3: Hard Mode Karagga That info is everywhere, what I'm wondering about is the group sizes and Nightmare mode. I've heard 8 man, 16 man, and nightmare mode & I have no clue which applies to which. So if someone could explain Nightmare mode and give me group numbers to flashpoints and operations, that would be amazing. Thank you very much, ~Kor'Lok