This chart is the card you see and the requirements to get it, listed in order of "best" to "worst" ending.
World: 3 mystic treasures, 12 zodiac stones, all characters except Galf (Lyon and Deneb are optional), high reputation
Emperor: male, 3 mystic treasures, high reputation
Empress: female, 3 mystic treasures, high reputation
Heirophant: male, have Rauny, high reputation
Priestess: female, have Tristan, high reputation
Sun: male, high reputation
Moon: female, high reputation
Chariot: Tristan, medium reputation
Hanged Man: medium reputation
Devil: Galf and low reputation
Death: Regular charisma and low reputation
Tower: low charisma and low reputation
Fortune: Beat Dragon's Haven (special stage)
That's it for the endings, I'll let you discover what happens in each one.