Often, when fighting big enemies with a huge HP bar, Stagger is indispensable. But a lot of times, it's hard to get the chain gauge started, especially on weaker enemies, because their Stagger goes back down to 100% very fast. The way to keep it going up takes a little practice, but will be very handy in finishing fights fast. First, it is necessary to make all of your party members go into commando or ravager (this is usually labeled Relentless Attack or something of the likes in the Paragdim menu). Then, go to auto-attack, and attack your desired enemy. Then, go auto-attack again, but instead of attacking right away, highlight the enemy, but do not push X. Wait until your other party members finish their attacks, and then launch yours. After that, keep attacking as fast as you can. This times your party's attacks so that there is a continuous stream of attacks as opposed to a lot of attacks at once. So whenever the chain starts to go down, another attack forces it to go up, thus stopping it from resetting to 100%. As the Chain Gauge gets higher, it takes longer to reset, so you can afford taking a bit of damage from other enemies. In Stagger, the enemy will often not move, but bigger foes will. What Stagger really does is knocks down all of the enemies defenses and makes them very vulnerable to any attack. The instant you get to the Stagger percentage, a big flash will announce Stagger, and your enemy will glow yellow. Any enemy that is Staggered will also have their name appear in a yellow capsule when you have to select a target for an attack as opposed to a blue one. When Stagger is activated, the Chain Gauge bar doubles as a timer. The bar is filled to start, and slowly depletes. When the bar is completely gone, Stagger has reset. And if the enemy survives until a Stagger reset, then that enemy must be strong, so take advantage of your Medic here (it is advantageous to have both Vanille and Hope as Medics) until your party's health is back up. Then go into Relentless Attack mode again, and achieve Stagger as soon as possible.