Beat the Clawshrimp Ring-Around-The-Rosie boss. It was sort of close but I major overkilled him with a Grand Summon.
Then, I fought Yunalesca.
For an hour.
After FINALLY winning, the game promptly freezes up.
Nah just kidding but holy goddamn that was not easy. That was also the most fun I ever had with an FF boss fight. The stuff in the last two phases with zombie where you're pretty much forced to let your characters get it and die from regen to block yourself against that Megadeath thing is nuts. And I like how it wasn't a trick boss. I mean I looked at a boss faq and got nothing. It's just, like... it felt like a Megaten boss.
Also the stuff with zombie was amusingly thematic. Like Lulu says, if you want everything, you'll end up with nothing. And you can't keep all of your dudes alive so it's more a matter of timing who dies when. Which also sort of works with the inevitable death theme around that point too
Additionally, I'm now out of money because I had enough to do around 20k with Rikku's Spare change during phase to. And I used it all.