If you think those minimiun requirement for the extreme primals are remotely accurate you my friend got another thing coming, you will be in for a world of EXTREME - headaches and migraines and endless rotation cycles. The real requirement I would say is around this bracket range.
Garuda Extreme:
Healer ilvl 65+
Tank ilvl 75+
DPS ilvl 77+
Titan Extreme:
Healer ilvl 70+
Tank ilvl 80+
DPS ilvl 75+
Ifrit Extreme:
Healer ilvl 75+
Tank ilvl 83+
DPS ilvl 80+
Ultima Hard: Bonus Round
Healer ilvl 60+
Tank ilvl 70+
DPS ilvl 73+
Further I want to add that even with these new numbers some of the adds have overshot HP pools for the average none premade group.
Garuda: Suparna, Chirada HP is bit excessive, Satin plume has slight high HP
Titan: Egi could use a slight numbers nerf
Ifrit: (need further testing)
Ultima: I know you want us to see the entire fight and all its mechanics but by the twelve that HP pool on ultima is insane. 462,592 FOR THAT ilvl require to do the fight is crazy long if you try to go at it with the minimum.