Well... I'm about to enter Memoria now.
Cause I'm the 'unsure' type, I wanted to get some advice.

Are there any abilities (either action or support) that are absolutely needed?
I'm planning to enter with Zidane, Dagger, Vivi and Freya, is that a good idea, or do you all suggest to take another party? Well, even if I beat them with this party, I'm still gonna go for it with everybody I left behind...

Oh, another thing. I'm currently doing the Chocobo quest to get Ultima weapon. Is Ultima Weapon a must to take on all those bosses in Memoria? Or is 'The Tower' good enough?

This is the last question, I promis! What lv do you all recommend to take on Kuja, Necron and all the others?

See? Told you it was the last one.