The spiritual successor to FF9 in being the next game to reference every FF game. You stack three characters into a two stack party with combined stats and level up to 150 different monsters with hidden powers. There is a summoning system where you control biblically accurate boss monster/s you can level and customize with extra attacks and resistances, and a standard summon where you can assign three different moves that are overpowered. While you can stack everything so you have two attacks a turn with full access to their moves, you can unstack and do 3-6 character specific attacks a turn.

There are many superbosses and most have their own dungeon to cross. You can buy full heals at the shop so you can survive them.
The game gets awfully grindy, which NG+ Expert somewhat speeds up and provides more lore to find.