If you have spare animas bring them, they are not as needed as for the early 3 promys but always help.
The first fight is uncapped but cake for lvl 75s so if you have inventory issues just bring your cap 50 gear.
Anyone with MP must bring juices/yag drinks for the fight, everyone must bring a reraise earring. Antidotes (if you don't have poisona)/high potions/ethers/pamama au laits etc. always help.
Think that's about it?