Increase resistance to all elements (40%) for 3 turns to all allies Increase resistance to all elements (49%) for 3 turns to all allies Increase resistance to all elements (30%) for 3 turns to all allies Increase resistance to all elements (34%) for 3 turns to all allies Increase resistance to all elements (20%) for 3 turns to all allies Increase DEF/SPR (80%) when HP drops below 30% Mitigate damage taken (30%) for 4 turns to all allies Increase LB gauge fill rate ( 150%) for 4 turns to all allies Increase LB gauge fill rate ( 100%) for 3 turns to all allies Lightning magic damage (20x) to all enemies Increase ATK/DEF (40%) for 5 turns to all allies Increase MAG/SPR (40%) for 5 turns to all allies Mitigate damage taken (30%) for 3 turns to all allies Increase DEF (100%) for 3 turns to one ally Increase SPR (100%) for 3 turns to one ally Increase LB gauge fill rate (50%) for 3 turns to all allies Increase ATK (100%) for 3 turns to one ally Similarly, Bravery is ok, but far outclassed by a unit with Cheer.Increase MAG (100%) for 3 turns to one ally Mental Break is ok, but does not stack with other debuffs, making it outclassed by a user (or user equipped with an esper) having Deshell, or even better, Full Break. There are some others that may be handy, but it entirely depends on your party and what units/skills you have available. MAG +10% for mages, SPR +10% for healers, etc. Stat Enhancers: Unless you grind out some tough trust master rewards, this is the easiest way to get equippable abilities to enhance your stats.

Not as essential as Barblizzara, however, as these elements aren't used as often, especially in current high-level fights.

Barwatera/Barstonra/Baraerora: There's no other way to protect the entire party against water, earth, or wind resistance, respectively.Barblizzara: Unless you have Cerius (who has the superior Barblizzaga) or Mizell, this is the best way to get resistance to ice damage, needed for a few of the currently toughest fights ( Demon Chimera, Colosseum Frost Dragon).With that being said, there are a few items that are very helpful, due to use and/or rarity (as of current release, 9/9/16). Some of these you can purchase/create by other means, which minimizes the need to use a silver key for the respective chest. Silver Chests primarily contain recipes for abilities, equipment, and skills.

Final fantasy brave exvius cerius