Screen Rant ranked the FF bosses from weakest to strongest (gameplay)

[maybee]

Ultimecia is just too easy to be anything but #1 for me.

I'm not sure I'm understanding your ranking system. Is Ulti weak or..?

Ulti is not what I'd call overly strong, but more to the point, your own characters are absurdly overpowered beyond all reason.

If you understand the Junction System, Ulti is easy peasy lemon squeezy.