While I had a relatively easy time likely due to my party's power, it's mostly about dealing with Raspatil's attack cycle being faster than yours. Raspatil has two gotchas:
You need to kill all the adds summoned before Raspatil casts Beseech. It will happen after a (somewhat extended) period time after every summon, so you can't stop focusing on adds until the end of the encounter.
You need to manage wounds to prevent yourself from getting into situations where your your party's max HP has been capped in the yellow zone, providing an opportunity for Raspatil to one shot you even with a dedicated healer.
So you need to be in a situation where you can:
- Kill 3-4 medium power adds in less ~30 seconds
- Heal back up to full from being in the low yellow zone in less than ~30 seconds
- Be able to stagger a 500%, 60 resistance chain gauge within ~30 seconds
But this is what I used (again, I'm at the end game, but most was overkill):
Serah
- Crystarium: completed
- Weapon: Odinbolt (156/160 fragments)
- Accessories: Hypnocrown, 2 × Durable Magician's Mark
- Strength: 539
- Magic: 1,220
- HP: 6,619
Noel
- Crystarium: completed
- Weapon: Odinblade (156/160 fragments)
- Accessories: Not used
- Strength: 988
- Magic: 642
- HP: 8,562
Paradigm pack
- Lightning (RAV): level 13, no infusions
- Green Chocobo (MED): level 99, infused with Feral Speed II
- Third slot wasn't used, but I'd suggest a sentinel for Combat Clinic (MED/MED/SEN) if needed
Paradigm deck
Serah is the party leader.
- Relentless Assault (RAV/COM/RAV) — Default
- Relentless Assault (RAV/COM/RAV)
- Diversity (RAV/COM/MED)
- Aggression (COM/COM/RAV)
- Fifth and sixth slots not used, but I'd suggest Combat Clinic (MED/MED/SEN) or Discretion (COM/MED/MED) if you can't heal fast enough in Diversity
Strategy
The cycle I used was:
- Juggle Relentless Assault (RAV/COM/RAV) paradigms using ATB Refresh1 to stagger Raspatil
- Use Lightning's Army of One feral link ability to increase the stagger chain to 750-800%2
- Increase the stagger chain to 900% in Relentless Assault
- Switch to Aggression (COM/COM/RAV) until adds are summoned
- Only switch to the adds a few seconds after summoned to maximize time on Raspatil
- Kill adds before Beseech
- Switch to Diversity to heal myself back up to the green zone3
- Go to step 1.
Unfortunately, Raspatil's attack cycle is a bit faster than mine: adds get summoned earlier and earlier in the stagger period and you start to get too low in health. So after the second or third stagger, I started switching to Diversity and targeting the adds immediately after they were summoned. This provided less time for damaging Raspatil, but kept the situation from spiraling out of control.
After the 5th or 6th stagger, Raspatil essentially lapped my cycle and caused me to almost miss a stagger entirely. This happened to be a blessing in disguise as it essentially resynced our attack cycles.
Once Raspatil was down to 25% and the chain gauge was up to 850–900%, I used Serah and Noel's ultimate attacks, Ultima Arrow and Meteor Javelin. Then I started to get a little more aggressive, staying in the Aggression phase of my attack cycle for longer. Raspatil died while all the adds were active, so I just finished them off and completed the encounter.
Notes
Note 1:To use the ATB Refresh mechanic, perform a full ATB bar of abilities, let them resolve, then immediately switch paradigms: doing so will immediately fill your ATB gauge. This has ~10 second cooldown, so the strategy is usually:
- Fill up ATB gauge in Paradigm A
- Queue up abilities and let them resolve
- Immediately switch to Paradigm B
- Queue up abilities and let them resolve
- Fill up ATB gauge in Paradigm B
- Queue up abilities and let them resolve
- Immediately switch to Paradigm A
- And so on.
Note 2: Because of the Hypnocrown and Feral Speed II, Lightning's Army of One was available once per stagger.
Note 3: If my party's average max HP was 75% of what it should be due to wounds, I took one turn during this period to pop a Wound Potion to allow my Green Chocobo to heal me back into the green zone.
