Ok, guys. I'm in Via Infinito~Cloister 61

1. I hear a lot of people saying that Chac and Trema is hard
This is my stat:
Yuna: Level 72, Dark Knight, Mythril Bangle, Champion Belt, Valiant Lustre
Rikku: Level 74, Dark Knight, Crystal Bangle, Champion Belt, Highroad Wind
Paine: Level 76, Gunner, Cat Nip, Speed Bracer, Highroad Wind

Is this ok? Or should I train more?

2. Where can I get Super Nova Blue Bullet?

3. All my chocobos can't reach level 5! Anyone can help? (I mean the place where good chocobo live)