You forgot this one tough
The footage isnt for the actual fight, but the ost is epic. On savage mode there is a perfect omega of sorts after you defeat Omega M and Omega F. It works like NeoExdeth and God Kefka, the normal mode boss is a somewhat simple fight with a massive DPS check and after you kill it theres a save point where you fight only the savage only boss till the timer runs out or you win.
Alphascape is my favorite raid on Stormblood, realy great fights.